Gonzales v. Raich (previously Ashcroft v. Raich), 545 U.S. 1 (2005), was a case in which the Unite States Supreme Court ruled on June 6, 2005 that under the Commerce Clause of the United States Constitution, which allows the United States Congress "To regulate Commerce... among the several States," Congress may ban the use of cannabis even where states approve its use for medicinal purposes.