In 1941, the Supreme Court overturned a Pennsylvania law that required non-citizens to register with the state, carry an "alien identification card" and present it to police officers upon demand.
The court said the law conflicted with a federal policy, based on treaty obligations and the constitutional principle of equal protection, that sought to "protect the personal liberties of law-abiding aliens" and keep them "free from the possibility of inquisitorial practices and police surveillance," including "indiscriminate and repeated interception and interrogation by public officials."
U.S. District Judge Susan Bolton cited that decision last week when she issued a preliminary injunction that...












The Spanish Prisoner: The Unequal Burdens of Arizona's Immigration Law