Article One of the United States Constitution
United States v. Lopez (1995) was the first decision in six decades to invalidate a federal statute on the grounds that it exceeded the power of the Congress under the Commerce Clause. The Court held that while Congress had broad lawmaking authority under the Commerce Clause, the power was limited, and did not extend so far from "commerce" as to authorize the regulation of the carrying of handguns, especially when there was no evidence that carrying them affected the economy on a massive scale. In a later case, United States v. Morrison (2000), the justices ruled that Congress could not make such laws even when there was evidence of aggregate effect.