This document provides an overview of the Commerce Clause of the U.S. Constitution and key Supreme Court cases that have interpreted the scope of congressional power under the clause over time. It discusses how early cases like Gibbons v. Ogden established a broad interpretation of commerce, but then cases between the late 1800s-1930s increasingly limited the definition. The document outlines how precedents started changing again in the 1930s-40s to expand congressional power in response to New Deal legislation, culminating in the expansive interpretation established in Wickard v. Filburn. It then discusses how the 1995 Lopez case reined in this interpretation to some degree by requiring a substantial effect on interstate commerce.
Related topics: