United States v. Lopez [1995]

514 U.S. 549 (1995) · Supreme Court of the United States · United States

constitutional lawconstitutional lawcriminal law and procedure

Issue

Was the statute a valid exercise of commerce power?

Held

No. The regulated conduct was not economic activity substantially affecting interstate commerce.

Exam use

Review the ratio and reasoning before applying this case in problem questions.

Summary

Modern limit on Commerce Clause authority.

Facts

Congress criminalized firearm possession in school zones under the Commerce Clause.

Issue

Was the statute a valid exercise of commerce power?

Held

No. The regulated conduct was not economic activity substantially affecting interstate commerce.

Ratio Decidendi

Commerce power has judicially enforceable limits, especially for noneconomic local activity.

Reasoning

Accepting the government's theory would erase meaningful limits on federal power.

Essay-Ready Explanation Generator

Version 1 of 4

Reference to United States v. Lopez (514 U.S. 549 (1995)) strengthens a constitutional law answer because the case reflects the principle that Commerce power has judicially enforceable limits, especially for noneconomic local activity. Applied to a problem question, the case should be used after identifying the issue as Was the statute a valid exercise of commerce power? The stronger essay move is to connect the material facts to the court's holding, then explain whether the present facts support the same conclusion or justify distinguishing the authority.

Significance

Modern limit on Commerce Clause authority.

Related Cases

No related cases listed.

Exam Tips

Review the ratio and reasoning before applying this case in problem questions.

Revision Checklist

  • Name the issue before discussing facts so the marker sees the legal question immediately.
  • State the holding in one sentence, then use the ratio to explain why the court reached that result.
  • Use the citation and jurisdiction to show why this authority matters for the problem you are answering.
  • Pair this case with one supporting or contrasting authority if the question tests limits, policy, or exceptions.

Sources