US Judicial System – Constitution, Courts, and Cases Practice Test

The main idea being tested is how the Commerce Clause can reach local activities through the substantial effects doctrine. Wickard v. Filburn shows that Congress can regulate even local, seemingly non-commercial actions if their aggregate impact on interstate commerce is substantial.

In this case, a farmer grew more wheat than allowed by a federal quota. The wheat was for personal use, so it looked like a purely local activity. Yet the Court said that if many farmers did the same thing, the combined effect could alter nationwide wheat prices and thus affect interstate commerce. Because of this potential aggregate impact, Congress could regulate the activity under the Commerce Clause.

That’s why the correct interpretation is that federal regulation can extend to local activities if their substantial effect on interstate commerce justifies it. The other statements don’t fit Wickard’s reasoning: the decision did not shrink federal power or abolish the Commerce Clause, and it rejected the need for a direct interstate link, instead emphasizing substantial, aggregate effects.