A federal gun control law, known as the Brady Law, imposes on local authorities the obligation to perform mandatory background checks of potential gun buyers. In Printz v. United States, the U.S. Supreme Court holds that the law violates the Tenth Amendment. The federal government cannot issue directives requiring the states to address particular problems, or command state officials to enforce a federal regulatory program. The Court reasons that such commands are “fundamentally incompatible with our constitutional system of dual sovereignty.”