South Dakota v. Dole, 483 U.S. 203 (1987), was a case in which the United States Supreme Court considered the limitations that the Constitution places on the authority of the United States Congress when Congress uses its authority to influence the individual states in areas of authority normally reserved to the states. The Court upheld the constitutionality of a federal statute that withheld federal funds from states whose legal drinking age did not conform to federal policy.