In United States v. Darby, 312 U.S. 100 (1941), the U.S. Supreme Court upheld the Fair Labor Standards Act, declaring:
- "The power of Congress over interstate commerce is not confined to the regulation of commerce among the states. It extends to those activities intrastate which so affect interstate commerce or the exercise of the power of Congress over it as to make regulation of them appropriate means to the attainment of a legitimate end, the exercise of the granted power of Congress to regulate interstate commerce."
Id. at 118.