The Commerce Clause gives Congress power to regulate commerce with foreign nations, among the several states, and with the Indian tribes. It is the workhorse of federal legislative power, and most modern federal statutes rest on it. The doctrinal question is always the same: is the thing Congress is regulating close enough to interstate commerce that the power reaches it, or has Congress crossed into what the states alone may govern?
Rule
- Channels. Congress may regulate the channels of interstate commerce, such as highways, waterways and air traffic.
- Instrumentalities. It may regulate the instrumentalities of interstate commerce and persons or things in it, including for their protection.
- Substantial effects. It may regulate activity that substantially affects interstate commerce.
- Aggregation. Where the regulated activity is economic, courts aggregate its effects across the whole country rather than looking at one actor.
- Limits. Non-economic activity is not aggregated in the same way, and the Court has been unwilling to sustain regulation of activity that is neither economic nor connected by a jurisdictional element.
- Compulsion. The clause has been read to reach the regulation of existing commerce rather than to compel people to enter it.
Leading cases
- Gibbons v. Ogden: commerce means more than buying and selling, it includes navigation and commercial intercourse, and the federal power over it is broad.
- Wickard v. Filburn: wheat grown for use on the farmer's own land could be regulated, because the aggregate effect of many such growers on the national market was substantial.
- United States v. Lopez: a statute banning guns near schools exceeded the power, because possessing a gun in a school zone was not economic activity substantially affecting commerce.
- National Federation of Independent Business v. Sebelius: a majority concluded the clause did not authorize requiring people to buy insurance, while the requirement was sustained as an exercise of the taxing power.
Where students go wrong
The first mistake is skipping the category. Say which of the three categories the statute fits, because the analysis and the limits differ.
The second is aggregating everything. Aggregation is powerful, but the Court has confined it to economic activity, and that distinction is what most modern cases turn on.
The third is treating this as the only federal power available. Taxing, spending and the enforcement provisions of the Reconstruction Amendments are often better ground, and a strong answer says so.
FAQ
Can Congress regulate purely local activity?
Sometimes. If the activity is economic and its aggregate effect on interstate commerce is substantial, the power reaches it even where the individual instance is trivial and local.
What is a jurisdictional element?
Statutory language limiting the offense to conduct with an express connection to interstate commerce. It narrows the statute and makes it much easier to sustain.
Does the Tenth Amendment limit the commerce power?
It reserves to the states what is not delegated, and the Court has used anti-commandeering principles to stop Congress ordering states to enact or enforce federal programs.
Related terms
Working through this in your own casebook takes longer than reading it here. Syllume starts from your syllabus and turns each assigned case into a brief you can study from.