On June 25, 2012, the U.S. Supreme Court unanimously rejected the federal government’s challenge to a key provision of SB 1070, the Arizona statute that cracks down on illegal immigrants living within the State. The provision upheld by the Court, § 2(B), directs Arizona law enforcement officers to check the immigration status of those they have been lawfully stopped, whenever they have a reasonable suspicion that the individual is an illegal alien. The Court rejected the Obama Administration’s claim that the law necessarily interferes with the federal government’s own efforts to enforce immigration law. The decision was a victory for WLF, which filed a brief in support of § 2(B) on behalf of 12 Members of Congress, including House Judiciary Committee Chairman Lamar Smith. While the Court also voted 5-3 to strike down several minor provisions of SB 1070, the decision reaffirmed the principle that States have an important role to play in the enforcement of federal immigration law.