During a time of political controversy in the United States over immigration policy and enforcement, the State of Arizona enacted a statute to deal with the large number of unlawful aliens in the state. Section 3 made it a misdemeanor under Arizona law for any person to violate federal alien-registration laws. Section 5(c) made it a misdemeanor for an unauthorized alien to seek or engage in work in the state. Section 6 authorized state and local officers to arrest without a warrant any person they believed could lawfully be removed from the United States. Section 2(B) required state and local officials to contact federal officials for the purpose of verifying the immigration status of any person who had been lawfully stopped or detained. The United States brought this action against Arizona challenging the constitutionality of the statute. A federal district court enjoined enforcement of the statute, and Arizona appealed. The Supreme Court granted certiorari.
1. Where does the federal government derive its authority to regulate immigration?
2 What policy arguments does the court give for the federal government's regulation of immigration?
3. On what grounds did the Court strike down three parts of the Arizona statute?
4. Why did the court uphold the fourth part of the Arizona statute (2B)?