Chamber of Commerce v. Whiting, 563 U.S. ___, 131 S. Ct. 1968 (2011)

In 1996, Congress created E-Verify, which is “an internet-based system that allows an employer to verify an employee’s work-authorization status.” In 2007, Arizona enacted the Legal Arizona Workers Act, which allows Arizona to suspend or revoke the licenses necessary to do business in the state if an employer knowingly or intentionally employs an unauthorized alien. Among other things, the Arizona law also requires that “every employer, after hiring an employee, shall verify the employment eligibility of the employee” by using E-Verify. In this case, the Chamber of Commerce challenged the Arizona law on the ground that it is expressly and impliedly preempted by federal immigration law, but the Supreme Court rejected those claims, upholding the statute.