"Aliens, even aliens whose presence in this country is unlawful, have long been recognized as 'persons' guaranteed due process of law by the Fifth and Fourteenth Amendments," Plyer v. Doe, 457 U.S. 202, 210 (1982); see also Kwong Hai Chew v. Colding, 344 U.S. 590, 596 (1953) (resident aliens are persons within the protection of the Fifth Amendment and may not be deprived of life, liberty or property without due process); Wong Wing v. United States, 163 U.S. 228, 238 (1896) (aliens accused of a crime are entitled to Fifth and Sixth Amendment rights).
Aliens enjoy equal protection rights as well, but distinctions between illegal aliens and others do not require as strong justifications as distinctions between citizens and aliens lawfully in the United States. Distinctions between resident aliens and citizens require more justification, but not the compelling state interests required for distinctions based on race. The longer an alien has been in the United States and the more legitimate the alien's immigration status, the more equivalent the alien's equal protection rights are to those of a U.S. citizen. Consistent with Article 25 of the Covenant, aliens are generally precluded from voting or holding federal elective office.
Thank you.