MOORE, J., delivered the opinion of the court, in which WHITE, J., joined. VINSON, D.J. (pp. 389-84), delivered a separate dissenting opinion.
OPINION
KAREN NELSON MOORE, Circuit Judge.Defendants-Appellants, Michigan Secretary of State Terri Lynn Land (“the Secretary”) and Director of Elections Christopher M. Thomas (“the Director”) (collectively, “defendants”), bring this *376emergency motion to stay a preliminary injunction that the district court issued in favor of plaintiffs-appellees, the United States Student Association Foundation, the ACLU Fund of Michigan, and the ACLU of Michigan (collectively, “plaintiffs”). This preliminary injunction orders defendants to refrain from rejecting a voter’s registration when that voter’s identification card (“voter ID card”) is returned to election officials as undeliverable and to reinstate the registration of all voters whose registrations have been rejected pursuant to this practice since January 1, 2006. We grant the defendants’ motion for expedited review and we DENY defendants’ motion for a stay, leaving in place the district court’s preliminary injunction. We direct the clerk to establish an expedited briefing schedule for the defendants’ appeal of the preliminary injunction ordered by the district court.
I. BACKGROUND
This case raises the question of whether Michigan’s procedures applying to voters whose ID cards are returned to the state as undeliverable violate the National Voter Registration Act of 1993 (“NVRA”), 42 U.S.C. § 1973gg et seq. Currently, when a voter’s ID card is returned as undeliverable, defendants change that individual’s status from “active” to “rejected,” meaning that the individual’s name will not appear on local precinct lists on election day. See Defs.’ Mot. for Stay, Ex. B, Attach. 3 at 3 (Dep’t of State, Voter Registration Housekeeping Reminders); Pis.’ Resp. to Mot. for Stay, Ex. 5 at 1-21 (Voter Registration Module). On October 13, 2008, the district court issued a preliminary injunction enjoining this practice and ordering defendants to reinstate the active status of all individuals removed pursuant to this policy since January 1, 2006, unless the rejection was warranted for some other lawful reason.
Section 8 of the NVRA provides requirements that states must follow in the administration of voter registration. First, state election officials must “ensure that any eligible applicant is registered to vote in an election” whenever a valid voter registration form is postmarked or received by the appropriate state official no later than 30 days before the date of the election. 42 U.S.C. § 1973gg-6(a)(l). The appropriate state election official must then “send notice to each applicant of the disposition of the application.” 42 U.S.C. § 1973gg-6(a)(2). A registrant’s name may not be removed from the official list of eligible voters except at the registrant’s request, due to criminal conviction or mental incapacity as provided by state law, the death of the registrant, or due to a change of the registrant’s residence. 42 U.S.C. § 1973gg-6(a)(3)-(4). Removal by reason of change of residence, however, may be conducted only in accordance with specific requirements set forth in subsections (b), (c), and (d) of section 8 of the NVRA. Specifically, § 8(d) provides the circumstances under which a state may remove a name from voting rolls:
1) A State shall not remove the name of a registrant from the official list of eligible voters in elections for Federal office on the ground that the registrant has changed residence unless the registrant—
(A) confirms in writing that the registrant has changed residence to a place outside the registrar’s jurisdiction in which the registrant is registered; or
(B)(i) has failed to respond to a notice described in paragraph (2); and
(ii) has not voted or appeared to vote (and, if necessary, correct the registrar’s record of the registrant’s *377address) in an election during the period beginning on the date of the notice and ending on the day after the date of the second general election for Federal office that occurs after the date of the notice.
42 U.S.C. § 1973gg-6(d).
In Michigan, the NVRA has been implemented through the Michigan Election Law. Michigan sets four requirements that an individual must meet by the time of the next election in order to be “entitled to be registered as an elector”: “The person shall be a citizen of the United States; not less than 18 years of age; a resident of the state for not less than 30 days; and a resident of the township, city, or village on or before the thirtieth day before the next regular or special election or primary election.” Mich. Comp. Laws § 168.492. Since the 1998 election cycle, Michigan has employed a statewide voter registration database, the Qualified Voter File (“QVF”), which is maintained by the Secretary of State. Mich. Comp. Law § 168.509o; see also Defs.’ Resp. in Opp. to Mot. for Prelim. Inj. at 22-23. The QVF allows local election officials throughout the state to access the voter registration database and to add, change, or delete records contained in the QVF. Mich. Comp. Laws § 168.509p. Once the proper local clerk receives and reviews an application and determines that the applicant is qualified as an elector, that clerk enters the voter’s information into the QVF. See Pis.’ Resp. to Mot. for Stay, Ex. 5 at 1-5 (Voter Registration Module). Individuals entered into this database can be identified with different status labels. “Active” is the default label which allows an individual to vote without further action or verification. See Defs.’ Mot. for Stay at 5-6. Individual entries can also be marked as “rejected” or “cancelled,” and names bearing these labels will not appear on the lists of voters distributed to polling places on election days. Pis.’ Resp. to Mot. for Stay, Ex. 5 at 1-21 (Voter Registration Module); Defs.’ Mot. for Stay, Ex. B. ¶ 9 (Thomas Aff.). Entries can also be marked as “verify” or “challenged,” and individuals labeled as such will appear on precinct voter lists, but will be required to provide further information before casting a ballot. See Pis.’ Resp. to Mot. for Stay, Ex. 5 at 1-21 (Voter Registration Module).
When a local clerk enters a new voter’s registration information into the QVF, that voter will be marked as “active,” and is therefore deemed qualified to vote. Id. After entering a new voter into the QVF, the local clerk will mail that individual an “original” voter ID card. Mich. Comp. Laws §§ 168.499(3), 168.500c. “[I]f the ‘original’ voter identification card is not returned to the clerk’s office, its receipt is presumed and an applicant becomes a registered voter in the State of Michigan.” Defs.’ Mot. for Stay at 5-6; see also Mich. Comp. Laws §§ 168.499(3), 168.500c. If, however, “the original voter identification card is returned to the clerk by the post office as nondeliverable, the clerk shall reject the registration and send the individual a notice of rejection.” Mich. Comp. Laws § 168.499(3); see also § 168.500c.1 If *378no forwarding address is provided by the post office, the individual’s QVF status will be changed from “active” to “reject — residence,” see Defs.’ Mot. for Stay, Ex. B, Attach. 3 at 3 (Dep’t of State, Voter Registration Housekeeping Reminders), and his or her name will therefore not appear on local voting lists on election days, preventing the individual from casting a traditional ballot, though poll workers are instructed to offer a provisional ballot.2 See Defs.’ Mot. for Stay, Ex. B, Attach. 4 (Handling Voters Who Do Not Appear on the QVF List). Individuals may check their registration status online at the Michigan Voter Information Center. Once an individual’s information is in the QVF, even if the voter ID card has not yet been printed or mailed, an individual checking his or her registration online will be directed to a screen reading, “Yes, You Are Registered!” Pis.’ Resp. to Mot. for Stay, Ex. 6 (Mich. Voter Information Center).
The plaintiffs assert that Michigan’s practice of changing voter status based on an undeliverable voter ID card violates the provisions of the NVRA detailing the conditions that must be met before an individual can be removed from state voting rolls.3 This issue was brought to defendant’s attention on July 8, 2008, in a letter from Mr. Bradley Heard of the Advancement Project, which asserted that Michigan’s treatment of undeliverable voter ID cards violated the NVRA. Defs’ Mot. for Stay at 9; see also Pis.’ Br. in Supp. of Mot. for Prelim. Inj., Ex. 9 (Heard Ltr.). The defendants failed to respond to this letter until August 29, 2008, when they denied that the undeliverable-voter-ID policy violated the NVRA and refused to make any changes to the practice. Pis.’ Br. in Supp. of Mot. for Prelim. Inj., Ex. 10 (Thomas Ltr.).
On September 17, 2008, the plaintiffs filed suit in the district court seeking an expedited hearing and injunctive relief. The plaintiffs asserted, among other things, that the undeliverable-voter-ID-card practice violates section 8(d) of the NVRA. See 42 U.S.C. § 1973gg-6(d). The plaintiffs contended that, because an individual becomes eligible to vote once his or her name is entered on the QVF, before an ID card is even issued, removing that individual from “active” to “rejected” status violates section 8(d), which provides the *379exclusive method for removal of registered voters. The plaintiffs requested that the district court enter a preliminary injunction ordering, in relevant part, that the defendants discontinue the practice of immediately rejecting a voter’s registration based on the return of the original voter ID card as undeliverable, treat the return of original voter ID cards in the same manner as the return of duplicate ID cards, restore to “active” status all voters whose registrations were rejected pursuant to Mich. Comp. Laws § 168.500c after January 1, 2006 and who are not ineligible for some other reason, and maintain and preserve relevant records.
The defendants filed a brief in opposition to this motion on September 26, 2008, and the plaintiffs replied on September 29, 2008. With the permission of the district court, each of these filings exceeded the usual page limits and included extensive additional materials. On September 30, 2008, the district court held a hearing on the motion. The district court issued a preliminary injunction on October 13, 2008.4 The district court found that the undeliverable-voter-ID-card practice violated § 8(d) of the NVRA. Specifically, the district court found that individuals become “registrants” for purposes of the NVRA as soon as they are placed on the QVF and designated “active” and thus cannot be removed unless the requirements of § 8(d) have been met. Regarding this practice, the district court found “that the plaintiffs have made a strong showing of success on the merits and a substantial but not overly strong showing of irreparable harm” and that the preliminary injunction “would work very little hardship on the defendants and would be in the public interest.” Dist. Ct. Prelim. Inj. Order at 38, 2008 WL 4559548. Specifically, the district court ordered that the defendants:
(1) Immediately discontinue their practice of cancelling or rejecting a voter’s registration based upon the return of the voter’s original voter identification card as undeliverable;
(2) Remove the “rejected” marking in the QVF from the registrations of all voters whose original voter IDs have been returned as undeliverable since January 1, 2006 until the present, unless rejection was warranted for some other lawful reason;
(3) Make no other designation, including but not limited to “cancelled,” in these voters’ registration records in the QVF or elsewhere, that will prevent their ballots from being counted if they appear at the polls and give whatever further proof of Michigan residence is required or permitted under applicable state and federal law; unless such a designation is warranted by written notice from the voter or for some reason other than change of residence;
(4) Preserve and not destroy until after December 31, 2009, any and all records relating to maintenance of Michigan’s voter registration files that have, since January 1, 2006, resulted in the cancellation of the registration of voters who have applied for out of state driver’s licenses, or the cancellation or rejection of voters’ registrations based upon the return of original voter identification cards; and
(5) Give no order, direction, or encouragement that any other government *380official or any other person engage in activity hereby prohibited to them.
Id. at 42.
On October 17, 2008, the defendants petitioned the district court for a stay of the preliminary injunction pending appeal, and the district court denied this motion on October 24, 2008. The defendants filed the instant motion in this court seeking a stay of the preliminary injunction pending-appeal on October 24, 2008,5 arguing that the district court abused its discretion in granting preliminary injunctive relief. First, the defendants argue that they can demonstrate a strong likelihood of success on the merits for two reasons: (1) plaintiffs did not have standing to bring their claims; and (2) Michigan’s practice does not violate the NVRA because an individual whose original voter ID card is returned as undeliverable never actually becomes a “registrant,” and so is never removed from the voting rolls. The defendants next argue that the plaintiffs will not be harmed if the preliminary injunction is stayed, because the risk of voter disenfranchisement is small. Further, the defendants argue that, without a stay, they will suffer irreparable harm due to the interruption of their preparations for holding the upcoming election on November 4. Finally, the defendants argue that the public interest in enforcement of legitimate statutory processes to ensure that only qualified persons are registered to vote weighs in favor of granting a stay.
II. ANALYSIS
In deciding whether to grant a stay of a preliminary injunction, defendants have the burden of showing: “(1) whether the movant has a strong likelihood of sue-cess on the merits, (2) whether the movant would suffer irreparable injury absent a stay, (3) whether granting the stay would cause substantial harm to others, and (4) whether the public interest would be served by granting the stay.” Northeast Ohio Coal. for the Homeless v. Blackwell, 467 F.3d 999, 1009 (6th Cir.2006).
In considering defendants’ motion for a stay of the district court’s preliminary injunction, we are deciding whether the defendants are likely to be able to show that the district court abused its discretion in granting the preliminary injunction. When we review a “district court’s ultimate determination as to whether the four preliminary injunction factors weigh in favor of granting or denying preliminary injunctive relief,” we review for an abuse of discretion. Certified Restoration Dry Cleaning Network, L.L.C., v. Tenke Corp., 511 F.3d 535, 541 (6th Cir.2007). We review de novo the legal conclusions made by the district court, and we review its factual findings for clear error, but our review of the district court’s ultimate decision regarding injunctive relief is reviewed under the “ ‘highly deferential’ ” abuse-of-discretion standard. Id. (quoting Leary v. Daeschner, 228 F.3d 729, 739 (6th Cir.2000)). Therefore, when considering defendants’ motion for a stay of the preliminary injunction, we must determine whether the defendants are likely to be able to show that the district court abused its discretion when it issued the preliminary injunction. We conclude that the defendants have not shown that it is likely that the district court abused its discretion in granting the preliminary injunction, and we must therefore deny defendants’ motion to stay the preliminary injunction.
*381A. Likelihood of Success on the Merits
Defendants have not shown that they are likely to succeed in showing that the plaintiffs lack standing. See Sandusky County Democratic Party v. Blackwell, 387 F.3d 565, 573-74 (6th Cir.2004). Similarly, defendants are unlikely to succeed in demonstrating that the undeliverable-voter-ID-card practice is lawful.6 The district court’s finding that the undeliverable-voter-ID-card practice violates the NVRA is a conclusion of law that we would review de novo if we were reviewing the grant of the preliminary injunction. Certified Restoration Dry Cleaning Network, 511 F.3d at 541. In order to establish a likelihood of success on the merits, the defendants must show that a de novo review of the district court’s decision that the application of Mich. Comp. Laws § 168.500c violates the NVRA would result in a determination that Michigan’s practice does not violate federal law. We hold that Michigan’s undeliverable-voter-ID-eard practice likely violates the clear language of the NVRA and that defendants have not, therefore, shown that they are likely to succeed on the merits of this issue.
In 1993, Congress passed the NVRA as a measure meant to “reinforce the right of qualified citizens to vote.” Ass’n of Cmty. Orgs. for Reform Now v. Miller (Miller ID, 129 F.3d 833, 835 (6th Cir.1997). The section of the NVRA at issue limits the methods which a state may use to remove individuals from its voting rolls and is meant to ensure that eligible voters are not disenfranchised by improper removal. See Bell v. Marinko, 367 F.3d 588, 591-92 (6th Cir.2004). The provision at issue states:
Removal of names from voting rolls
(1) A State shall not remove the name of a registrant from the official list of eligible voters in elections for Federal office on the ground that the registrant has changed residence unless the registrant—
(A) confirms in writing that the registrant has changed residence to a place outside the registrar’s jurisdiction in which the registrant is registered; or
(B)(i) has failed to respond to a notice described in paragraph (2); and
(ii) has not voted or appeared to vote (and, if necessary, correct the registrar’s record of the registrant’s address) in an election during the period beginning on the date of the notice and ending on the day after the date of the second general election for Federal office that occurs after the date of the notice.
42 U.S.C. § 1973gg-6(d) (emphasis added).
A simple reading of this statute reveals exactly whom this statute protects and from what: States may not remove “registrants” from an official list of eligible voters based on a change in residence unless certain conditions have been met. We believe that, if a person is a “registrant,” a state may not remove his or her name *382from an official registration list on the grounds that his or her residence has changed unless the specified criteria of 42 U.S.C. § 1973gg(d) are met. We conclude that it is highly unlikely that the defendants will be able to show that the district court’s interpretation of the NVRA was erroneous.
Given the clarity of the statute, it is not surprising that defendants do not dispute the fact that, if persons rejected under the undeliverable-voter-ID-card practice are registrants, such removals violate the NVRA. Rather, as was the case in the district court, “[t]he parties’ dispute over the legality of the undeliverable ID practice essentially boils down to a disagreement over the meaning of the word ‘registrant,’ as it appears in the NVRA.” Dist. Ct. Prelim. Inj. Order at 16. Defendants contend that, because the NVRA does not define “registrant,” state law must provide the definition. Defendants also assert that, under Michigan law, an individual is registered to vote only after he or she has received an original voter ID card. Defendants argue that an individual whose original voter ID card was returned as undeliverable was never a registrant in Michigan such that the protections of the NVRA apply. Accordingly, defendants assert that they can reclassify these individuals as “rejected” voters within the QVF even if the conditions required by the NVRA have not been met. For the following reasons, we are not persuaded that defendants’ arguments are likely to succeed.
First, we do not agree that state law must be used to define “registrant.” In fact, Michigan law recognizes that federal law determines who is a registrant; “Notwithstanding another provision of law to the contrary, a person who is a qualified elector in this state and who registers to vote in a manner consistent with the national voter registration act of 1993 is considered a registered voter under this act.” Mich. Comp. Laws § 168.509t(l). The district court correctly observed that “making the question of who is a ‘registrant’ a matter of state law would frustrate the NVRA’s purpose of regulating state conduct of elections, by essentially permitting states to decide when they will be bound by the [NVRA’s] requirements.” Dist. Ct. Prelim. Inj. Order at 18.7 While the NVRA allows states to have their own eligibility requirements and registration procedures and policies, it places limits on those policies. One such limit is the NVRA’s mandate that “registrants” can be removed from voter rolls only if certain conditions are met. If states could define “registrant,” they could circumvent the limitations of the NVRA by simply restricting the definition, and hence the federal protections of the NVRA, to a very limited class of potential voters. A federal statute cannot adequately protect the rights of individuals from actions of the state if the state is free to define the protected class as broadly or as narrowly as it chooses. If we were to adopt defendants’ view, states could completely ignore the requirements of the NVRA, 42 U.S.C. *383§ 1973gg-6(d). We refuse to import such a reading to this statute.8
Because state law cannot control the definition of “registrant,” we resolve the meaning of “registrant” under the NVRA as a matter of federal law. We have found no case which has considered this issue. Because the ultimate goal of registering to vote is to permit a person actually to vote, we think that, at the very least, a person becomes a “registrant,” for the purposes of the NVRA, from the first moment that he or she is actually able to go to the polls and cast a regular ballot.
Though the definition of “registrant” is governed by federal law, because that definition involves determining when an individual is actually able to cast a vote, we must look to state law defining when an individual can first go to the polls and cast a regular vote, regardless of what label state law may attach to that individual.9 According to defendants, once a clerk determines that an application passes initial review, that applicant’s name is entered into the QVF as an “active” voter. Pis.’ Resp. to Mot. for Stay, Ex. 5 at 1-21 (Voter Registration Module). If the original voter ID card is not returned to the clerk as undeliverable, that individual is considered a registered voter without any further action by the clerk. Defs.’ Mot. for Stay at 5-6; see also Mich. Comp. Laws §§ 168.499(3), 168.500c. If, however, the original voter ID card is returned to the clerk as undeliverable, the clerk must go back into the QVF and change that individual’s voter status from “active” to “rejected.” Defs.’ Mot. for Stay, Ex. B, Attach. 3 at 3 (Dep’t of State, Voter Registration Housekeeping Reminders). Defendants assert that because state law dictates that such voters “shall be deemed not registered,” Mich. Comp. Laws § 168.500c, the fact that the status of these voters was changed from “active” to “rejected” does not constitute removal of a “registrant” under the NVRA. We conclude that defendants’ argument is not likely to succeed on the merits.
Defendants’ entire argument is based on their assertion that the state-law definition of “registrant” must apply to the NVRA. However, as we explained above, this cannot be the case. While state law is vital in determining when a person becomes actually eligible to vote, the labels that state law places on individuals are not binding for purposes of the NVRA. Said another *384way, it does not matter whom Michigan decides to call a “registrant”; what matters is, functionally speaking, when an individual becomes able to cast a ballot.
In Michigan, an individual must meet four specific requirements in order to be eligible to vote: “The person shall be a citizen of the United States; not less than 18 years of age; a resident of the state for not less than 30 days; and a resident of the township, city, or village on or before the thirtieth day before the next regular or special election or primary election.” Mich. Comp. Laws § 168.492. Receipt of the original voter ID card is not a requirement for eligibility. Instead, the original voter ID card that is sent out. by the state of Michigan is the notice of disposition of the application to register to vote required by 42 U.S.C. § 1973gg-6(a)(2). If this were not the case, it appears that Michigan would be in violation of that section of the NVRA. Michigan does not contest that the original voter ID card serves this purpose or assert that some other document serves as the required notice. Because a notice of disposition alerts an individual that the state has determined that he or she meets state eligibility requirements, it necessarily follows that the eligibility decision has already been made. Indeed, the voter who checks his or her status after his or her name has been entered on the QVF will find the message “Yes, You Are Registered!” even before the voter ID card is mailed to him or her. Pis.’ Resp. to Mot. for Stay, Ex. 6 (Mich. Voter Information Center). Therefore, receipt of the original voter ID card cannot be part of the eligibility decision.
Applying this lens of analysis, a simple example illustrates why this status change on the QVF from “active” to “rejected” is meaningful and why individuals in Michigan are protected “registrants” under the NVRA from the moment the clerk identifies them as “active” in the QVF. Suppose that the clerk received a voter application from Mr. Doe, and per state law, entered him into the QVF as “active,” and then sent him an original voter ID card. Suppose also that Mr. Doe never received this original voter ID card, but due to human error, loss, or delay, the clerk did not receive the original voter ID card marked as undeliverable until after the election. On Election Day, Mr. Doe would appear as “active” in the QVF, and thus his name would appear on the poll list and he would be permitted to cast a regular ballot. Defendants assert that such a scenario is unlikely, but they cannot deny the fact that once Mr. Doe has been entered into the QVF as “active,” he will be treated as a regular voter. Because Michigan has chosen to treat individuals as “active,” as individuals permitted to cast ballots upon entry of their applications into the QVF, defendants cannot then withdraw this “active” voter status without complying with the NVRA. Once the state takes the step of identifying individuals as active voters, those individuals clearly become “registrants” protected by the.NVRA.
Throughout their motion for a stay, the defendants highlight the fact that a prior district court case determined that the undeliverable-voter-ID-eard practice did not violate the NVRA. See Ass’n of Cmty. Orgs. for Reform Now v. Miller (Miller I), 912 F.Supp. 976, 986-87 (W.D.Mich.1995). The dissent similarly relies on Miller I, stating that it “involv[ed] the same Michigan practice, the same Michigan statute, and the same provision of the [NVRA].” Dissent at 389. This reliance is misplaced. The district court decided Miller I two years before Michigan implemented the QVF, and the district court opinion in Miller I contains no mention of this system or how it would work. Additionally, the Miller I court did not have full information *385regarding the intricacies of the system or how Michigan would implement it.
Instead, the district court in Miller I rejected a claim that “under the NVRA an applicant is registered upon merely filling out a registration application.” Id. at 986. Contrary to the dissent’s characterization, Miller I did not “rejectf ] the view that an applicant is automatically registered to vote for purposes of the NVRA merely upon filling out the registration application and being placed on the official roll” Dissent at 389 (emphasis added). Miller I did not address the consequences of being placed on any official list such as the QVF, and was instead limited to considering the consequences of “filling out a registration application.” Miller I, 912 F.Supp. at 986. In the instant case, plaintiffs do not argue, and we do not hold, that filling out an application is the event that triggers NVRA protection. Instead, we conclude that it is likely that once Michigan gives an individual “active” status in the QVF, the status that would permit the individual to cast a regular ballot on Election Day, the individual becomes a “registrant” protected by the NVRA. The district court in Miller I did not address such an argument, and thus Miller I is not relevant to this determination.
Further, the Miller I court found that “under the NVRA the states are still left the task of determining that an applicant is eligible, and that the registration form as submitted complies with state law.” Id. at 987. Nothing in our holding today contradicts that finding. To the contrary, Michigan is still free to set eligibility standards and to evaluate whether each applicant meets those standards. However, once Michigan chooses to categorize an individual in such a way that would allow him or her to go to the polls and cast a regular ballot, regardless of what Michigan calls that person, he or she is a “registrant” for purposes of the NVRA. Currently, once the state determines that an applicant is qualified as an elector and affords an individual “active” status in the QVF, that individual is entitled to cast a ballot and thus is a “registrant” under the NVRA. Accordingly, our conclusion today does not contradict the district court opinion in Miller I, but rather modifies it in light of Michigan’s decision to list approved applicants as “active” in the QVF once the clerk has reviewed their applications.
We disagree with the dissent’s claim that Sixth Circuit precedent conflicts with the district court’s interpretation of the NVRA here. First, the Sixth Circuit opinion in Miller II addressed only the constitutional challenges to the NVRA made by Michigan in its appeal. Miller II, 129 F.3d at 834 (“We agree with the district court that the [NVRA] is constitutional, and that all of the involved plaintiffs are entitled to bring suit.”). Because no issues concerning the Miller I district court’s interpretation of specific NVRA or Michigan state law provisions were raised on appeal, we had no occasion to address that district judge’s interpretation of the provisions at issue in this stay motion before us now. Thus, the Sixth Circuit’s opinion in Miller II is irrelevant to today’s case.
Second, our opinion in Bell v. Marinko, 367 F.3d 588 (6th Cir.2004), is similarly distinct.10 In Marinko, we considered an Ohio law that allowed “registered voters to challenge the right of any person to vote.” Id. at 589. Ohio law instructed the Board of Elections to conduct a hearing to investigate the residency of each challenged individual, and, if the Board concluded that the challenged individual was not a resi*386dent of the precinct and therefore ineligible to vote, the Board should remove that person from the rolls. Id. at 591-92. The Ohio law considered in Marinko is very different from the one at issue here. Plaintiffs here challenge the rejection of eligible voters. The individuals who would be harmed by Michigan’s undeliverable-voter-ID-card practice are eligible voters. These eligible voters are entitled to the protections of the NVRA. Id. at 592 (“The National Voter Registration Act protects only ‘eligible’ voters from unauthorized removal.”). By contrast, the Ohio law at issue in Marinko permitted the state, after a hearing on the issue, to remove the names of ineligible individuals from its rolls. Id. The rejection of an eligible voter based solely on the undeliverable-voter-ID-eard practice is not at all similar to a state’s hearing-based determination that a particular challenged individual is not an eligible voter and should therefore be removed from the voting rolls. Here there has never been a determination that the voters are ineligible. To the contrary, the only determination made as to the voters here is that they are eligible, a determination the clerk receiving the application makes before forwarding the applicant an original voter ID card. Mich. Comp. Laws § 168.500c.
We determined in Marinko that the particularized challenge hearing for each specific voter established that the voter was not in fact a resident of the precinct and therefore that the voter was not eligible to vote in the precinct and could be removed from the voting rolls. We wrote, “Because the [NVRA] does not bar the Board’s continuing consideration of a voter’s residence, and instead encourages the Board to maintain accurate and reliable voting rolls, we find that the Board’s procedures in this case do not contravene the [NVRA].” Id. Marinko thus endorses the challenge-hearing approach utilized by Ohio to investigate a particular voter’s proper residence for voting purposes. Marinko does not endorse the Michigan practice of withdrawing all voters’ “active” status if their original voter ID cards are returned to the clerk as undeliverable.
Under our analysis, an individual is a “registrant” under the NVRA at the time that he or she is listed as “active” in the QVF, and any such individual who is “rejected” under the Michigan system because his or her original voter ID card is later returned as undeliverable has had his or her rights, as defined by the NVRA, 42 U.S.C. § 1973gg-6(d), violated. We therefore conclude that the defendants have not met their burden of making a sufficient demonstration that, ultimately, the Michigan undeliverable-voter-ID-card practice does not violate the NVRA. Accordingly, we hold that the defendants have not shown that they are likely to succeed on the merits, and that this factor weighs heavily against granting the stay that the defendants seek.
B. Harm to Defendants
The defendants assert that it is both “possible” and “feasible” for them to comply with the preliminary injunction. Defs.’ Mot. for Stay at 38. They raise two potential harms they will face if the requested stay is not granted: (1) changing procedures to comply with the preliminary injunction will cause a resource drain for state and local officials; and (2) the reactivation required by the preliminary injunction will revive old records, so that if previously rejected individuals later re-registered to vote at a new address, their previous address will spring back up in the system, creating new inaccuracies. Id. at 38-39. The defendants dispense with the second potential harm themselves, stating that a software program will have to be written to prevent poten*387tial errors. Id. at 39. The defendants do not, however, forecast great confusion associated with the implementation of this new software. Nor do they predict, after implementing this program, that any changes produced in compliance with the district court’s preliminary injunction will result in erroneous disenfranchisement. Accordingly, the only harm left is the potential resource drain for state and local officials, of which writing the new computer program for the QVF is one aspect.11
We are cognizant of Supreme Court decisions counseling courts to exercise “proper judicial restraint” before making “precipitate changes” to election procedures and policies when “an impending election is imminent and a State’s election machinery is already in progress.” Reynolds v. Sims, 377 U.S. 533, 585-86, 84 S.Ct. 1362, 12 L.Ed.2d 506 (1964); see also Purcell v. Gonzalez, 549 U.S. 1, 127 S.Ct. 5, 7-8, 166 L.Ed.2d 1 (2006). We have taken this potential practical problem into careful consideration, and we do not make light of the burden that the district court’s ruling may impose on Michigan’s Secretary of State. Purcell, however, demands “careful consideration” of any legal challenge that involves “the possibility that qualified voters might be turned away from the polls.” Purcell, 549 U.S. at 7, 127 S.Ct. 5. In this case, the district court’s preliminary injunction ensures that qualified voters whose registrations were rejected due to the undeliverable-voter-ID-card practice will not be turned away at the polls. Moreover, the district court has determined that staying the preliminary injunction would likely put individual voters at risk of disenfranchisement. Additionally, the preliminary injunction affects a small fraction of Michigan voters, at most 5500 individuals, and the change is therefore not a “precipitate” alteration to the state’s entire voting methodology. See Defs.’ Mot. for Stay at 39.
Moreover, defendants have already ceased using the undeliverable-voter-ID-card practice, see Pis.’ Resp. to Mot. for Stay, Ex. 7 (Mich. Dep’t of State, Federal Court Ruling), and appear already to have identified the voters whose voter status must be changed based on the preliminary injunction, see Defs.’ Mot. for Stay at 39 (noting how many individuals must be reactivated). Given the fact that defendants have quickly succeeded in complying with these components of the preliminary injunction, we cannot see how implementing the final step of the preliminary injunction, changing these voters’ designation on the QVF as ordered by the district court, will cause irreparable harm. To the contrary, we conclude that defendants have shown no real harm to themselves or to voters especially in light of the fact that the preliminary injunction permits defendants to label these voters “verify” and require further verification of their eligibility at the polls.
Because the only harm that the defendants assert is an administrative burden that they admit to be manageable, we conclude that this factor weighs against granting the requested stay.
C. Substantial Harm to Others and Public Interest
As discussed above, the preliminary injunction is necessary to protect the *388individual voters of Michigan affected by the undeliverable-voter-ID-card practice. The defendants raise a variety of potential harms to others and to the public that they suggest will result if their requested stay of the district court’s preliminary injunction is not granted. First, the defendants assert that court orders affecting elections may “result in voter confusion and cause a chilling effect.” Defs.’ Mot. for Stay at 41. The defendants do not assert that compliance with the preliminary injunction will result in the wrongful removal of any voters. Instead, the district court’s preliminary injunction ensures that each individual who has properly registered to vote but was removed due to an error that is out of his or her control will be able to cast a ballot on election day. Granting the stay of the preliminary injunction would cause confusion, leaving recently registered voters who have not received their original voter ID cards unsure of their status and of what they need to do in order to exercise their right to vote.
Defendants also contend that, even if an individual is wrongly purged from the poll books due to the undeliverable-voter-ID-card practice, he or she will still be able to east a provisional ballot, and thus no disenfranchisement occurs. However, this argument ignores Michigan law, which allows for some provisional ballots to go uncounted. In fact, in the 2006 elections, only 19.1% of all provisional ballots cast in Michigan were counted. See United States Election Assistance Commission, 2006 Election Administration and Voting Survey, at 19 (Dec.2007). Given that not all provisional ballots will necessarily be counted, the availability of provisional ballots may not protect those wrongly purged due to the undeliverable-voter-ID-card practice from substantial harm.
The defendants next assert that because the preliminary injunction will likely restore to the rolls some individuals who are not qualified to vote, there is a risk of both voter-registration fraud and actual voter fraud. Though the public certainly has an interest in a state being able to maintain a list of electors that does not contain any false or erroneous entries, a state cannot remove those entries in a way which risks invalidation of properly registered voters. Cf. Marinko, 367 F.3d at 590-92. The NVRA strikes a balance between removing fraudulent registrations while ensuring that legitimate voters are able to vote, and Michigan cannot remove names from its rolls in a manner that fails to respect this balance that Congress has drawn. Currently, Michigan’s undeliverable-voter-ID-card practice carries a risk of disenfranchising a large group of qualified voters.
Erroneous registrations harm the election itself only when improper registrants actually vote. Importantly, the preliminary injunction allows the state to guard against voter fraud by allowing the state to recategorize individuals affected by the undeliverable-voter-ID-card practice to “verify” status. See Dist. Ct. Stay Order at 2-3. This option, which the state appears to be exercising, allows the state to require individuals reinstated by the preliminary injunction to verify their residence at the polls before casting a regular ballot. See Pis.’ Resp. to Mot. for Stay, Ex. 7 (Mich. Dep’t of State, Federal Court Ruling). This is the practice that the state uses to avoid voter fraud by verifying the eligibility of voters whose eligibility may be questionable. Defendants do not argue that this system is insufficient to successfully weed out fraudulent voters. Because the risk of actual voter fraud is miniscule when compared with the concrete risk that Michigan’s policies will disenfranchise eligible voters, we must conclude that the public interest weighs in favor of denying the stay of the preliminary injunction. The preliminary injunction eliminates a *389risk of individual disenfranchisement without creating any new substantial threats to the integrity of the election process. Accordingly, the district court’s preliminary injunction seeks to ensure that Michigan’s elections are more fair, and to reach any other result would fly in the face of the very purpose of the NVRA.
D. Conclusion
We hold that each of the four factors discussed above weighs against granting the stay of the district court’s preliminary injunction that the defendants seek. In reaching this conclusion, we note that the district court accepted voluminous submissions from the parties and conducted a hearing, and we have the benefit of considering that information. The district court carefully considered all of the materials presented at that hearing, and we cannot say now that the district court abused its discretion in issuing the preliminary injunction.
III. CONCLUSION
In seeking a stay, the defendants carry the heavy burden of demonstrating that the district court likely abused its discretion in issuing the preliminary injunction. In order to meet this burden, defendants must convince this court that a stay is necessary in light of: (1) defendants’ likelihood of success on the merits; (2) any irreparable harm defendants will suffer if the stay is not granted; (3) any substantial harm to the plaintiffs that will result from a grant of the stay; and (4) what is in the best interest of the public. Though, at this late date, we understand the prudence of a policy of limited federal court involvement in elections, this fact does not change defendants’ burden. Considering that the defendants have indicated that the burden that the district court’s preliminary injunction imposes on them is not large; the defendants are highly unlikely to succeed on the merits; and without the preliminary injunction, plaintiffs’ members, along with members of the public as a whole, face wrongful disenfranchisement, we must DENY the requested stay of the district court’s preliminary injunction.
. In addition to original voter ID cards, the clerk also may send "duplicate” or “updated” voter ID cards when an elector is "affected by a change in United States representative, state senatorial, state representative, or county commissioner district or precinct.” Mich. Comp. Laws § 168.499(c). If a duplicate voter ID card is returned as undeliverable, the clerk is to "accept that as information that the elector has moved and ... proceed in conformity with section 509aa,” id.., which requires the clerk to send notice to the voter to confirm the voter’s residence, Mich. Comp. Laws § 168.509aa(2)-(3). If this notice is returned as undeliverable, the voter status is changed to "challenge-residence,” Defs.’ Mot. *378for Stay, Ex. B, Attach. 3 at 3 (Dep't of State, Voter Registration Housekeeping Reminders), allowing the voter to cast a traditional ballot on election day upon providing further information at the polls, Mich. Comp. Laws § 168.509aa(4).
. The 2003 Voter Registration Module, which instructs local officials on using the QVF, appears to distinguish between applications that were submitted at the Secretary of State branch office ("Branch Apps.”) and those that were submitted by other methods ("Non Branch Apps.”). According to the module, when an original ID card from a Non Branch App. is returned as undeliverable, the voter status is to be changed to "challenged.” Pis.' Resp. to Mot. for Stay, Ex. 5 at 1-29 (Voter Registration Module). This practice is not mentioned by the defendants, and more recent instructions from 2007 indicate that offi-ciáis are instructed to change the voter status to "reject-residence” for all voter ID cards that are returned as undeliverable with no forwarding address, regardless of the method of registration. Defs.' Mot. for Stay, Ex. B, Attach. 3 at 3 (Dep’t of State, Voter Registration Housekeeping Reminders).
. In the district court the plaintiffs also challenged Michigan’s practice of cancelling an individual's Michigan voter registration when Michigan received information that the individual had surrendered his or her Michigan driver’s license while registering for a driver’s license in another state. The district court found that, while Michigan’s practice likely violated the NVRA, injunctive relief was not warranted on these grounds. The plaintiffs have not cross-appealed the denial of relief based on driver’s-license-based cancellation, and therefore we do not consider this issue.
. On October 7, plaintiffs filed an amended complaint adding as a plaintiff the Michigan State Conference of NAACP Branches. Defendant McMullen filed an answer to the amended complaint on October 22, but the other defendants have not yet filed their answer.
. The defendants filed their motion with us hours before the district court issued its order denying their motion for a stay.
. Because this is an application for a stay of the preliminary injunction, we consider only the likelihood that defendants can show that the district court abused its discretion in issuing the preliminary injunction. Thus, we consider the district court’s order in light of the arguments of the parties before us in their briefs addressing the defendants’ motion for a stay. Because the district court based its issuance of the preliminary injunction on § 1973gg-6(d) alone and. did not consider 42 U.S.C. § 1973gg-6(a), nor have the parties raised the issue, we do not consider at this time what, if any, implications § 1973gg-6(a) has in regard to the definition of “registrant.” We only note that the definition of “registrant” may in fact be broader than we have contemplated in this opinion and reserve consideration of this issue.
. Supreme Court precedent indicates that when federal statutes give states limited powers within a federal statutory framework, the words creating that limitation are defined by federal, rather than state law. For example, the Federal Tort Claims Act (“FTCA”) makes the United States amenable to suit and liable for damages in certain circumstances but provides that the government will not be liable for punitive damages. 28 U.S.C. § 2674; see also Molzof v. United States, 502 U.S. 301, 304-05, 112 S.Ct. 711, 116 L.Ed.2d 731 (1992). In Molzof, the Supreme Court held that "the extent of the United States' liability under the FTCA is generally determined by reference to state law.” Id. However, the Court also held that the definition of "punitive damages,” a phrase used in "a federal statute, is by definition a federal question.” Id.
. The dissent quotes a single sentence from the district court’s opinion in Ass’n of Cmty. Orgs. for Reform Now v. Miller (Miller I), 912 F.Supp. 976 (W.D.Mich.1995), which seems to assume that state law determines when someone is registered. Dissent at 389-90. This issue of what law determines the meaning of "registrant” was not examined extensively in that district court opinion, and it was not considered by this court when we reviewed the district court's ruling. Miller II, 129 F.3d 833. The dissent’s assertion that an unchallenged district court statement is somehow binding on us or is the definitive "law with respect to th[is] aspect of Michigan’s voter registration procedure” is legally incorrect. Dissent at 390, n. 1. Even assuming that the district court in Miller I found that state law defines registrant for the purposes of the NVRA, prior district court cases do not bind this court, and the district court in Miller I does not convince us that defendants here are likely to succeed in this argument.
. The dissent cites the district court's determination in Miller I that "under the NVRA the states are still left the task of determining that an applicant is eligible, and that the registration form as submitted complies with state law.” Miller I, 912 F.Supp. at 987; Dissent at 389. Nothing we conclude today contradicts this statement. We are not focusing on Michigan’s eligibility requirements or on the process it uses to determine who should be entered into the QVF. We are considering only what Michigan does once it has granted an individual a voting status that "presumes” eligibility. Defs.’ Mot. for Stay at 5-6.
. We note that the bulk of the dissent’s discussion of Marinko relates to the district court’s opinion. What is relevant here is the Sixth Circuit’s opinion in that case.
. The defendants' reply brief suggests that the administrative burden is greater than they once thought. However, we are considering whether to stay the district court's decision to grant a preliminary injunction, a decision that we review itself only for abuse of discretion, and this new argument was never presented to the district court. Accordingly, we cannot say that the district court abused its discretion by believing defendants' earlier indications that the burden was minimal.