'Plenary power doctrine' o 'Equal protection'? (In margine ad alcune decisione della Corte Suprema degli Stati Uniti)

The analysis focuses on several decisions of the Supreme Court of the United States in order to identify its past and present attitude to federal legislation and acts of the Administration in the field of immigration. What emerges is a succession of judgments which are often inspired by that plenary power doctrine which removes the actions of Congress from supervisory jurisdiction, and which sometimes go as far as a judicial review in the light of the constitutional principle of equal protection.