The Supreme Court of the United States held that a federal statute requiring state chief law enforcement officers to conduct background investigations on potential handgun purchasers was unconstitutional because it encroached upon the rights reserved to the states by the Tenth Amendment to the United States Constitution.
Printz v. United States, 117 S. Ct. 2365 (1997).
Michael L. Johnson,
Constitutional Law - Tenth Amendment - State Sovereignty,
Duq. L. Rev.
Available at: https://dsc.duq.edu/dlr/vol36/iss2/10