Whether the Fifth Amendment permits the Federal Government to subject lawfully admitted resident aliens to a blanket employment exclusion without any judicial scrutiny because immigration and naturalization are federal political matters.
Holding
No. The Fifth Amendment's guarantee of due process requires some judicial scrutiny of a nationwide federal rule that broadly deprives resident aliens of employment opportunities, although federal classifications may be justified by national interests that would not justify identical state classifications.
Reasoning
The Fifth Amendment contains no Equal Protection Clause, but its Due Process Clause requires the Federal Government, like the States, to govern impartially. The Court recognized that equal-protection principles inform Fifth Amendment review, while also acknowledging that the federal government's special constitutional authority over immigration, naturalization, and foreign affairs may supply national justifications unavailable to a State.
The Court rejected the Government's position that any federal officer may discriminate against resident aliens without constitutional justification. Resident aliens are a discrete class already burdened by political and practical disadvantages, and a rule that bars them from a major sector of employment imposes a significant deprivation of liberty. That deprivation triggers due-process scrutiny.
The Court did not decide whether an express congressional statute or presidential directive excluding all noncitizens from federal employment would survive substantive equal-protection review. Instead, it adopted the narrower principle that, when the Government invokes an overriding national interest to support a classification that a State could not impose, there must be a legitimate basis to conclude that the official or institution adopting the rule actually acted to serve that interest.