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Foreign Affairs Federalism: A Revisionist Approach, Daniel Abebe, Aziz Z. Huq

Vanderbilt Law Review

In April 2010, the Arizona legislature enacted the Support Our Law Enforcement and Safe Neighborhoods Act. Commonly known as SB 1070, the law created a slate of new criminal offenses and arrest powers covering aliens within Arizona's borders. SB 1070 proved divisive. It inspired copycat legislation in several states, provoked sharp criticism from the legal academy, and-most relevant here- catalyzed a lawsuit by the U.S. Department of Justice seeking a preliminary injunction against the state law on the ground that it was preempted by federal law. Initially, the federal government's litigation prospects seemed dim. One term before SB 1070 reached …