concurring.
On the assumption that the Court’s language concerning discrimination “in the sphere” of the relevant preference statute, ante, at 281, does not imply that society-wide discrimination is always irrelevant, and on the further assumption that that language in no way cuts back on the Court’s decision in Kahn v. Shevin, 416 U. S. 351 (1974), I join the opinion and judgment of the Court.