[imbur]

Wickard v. Filburn is the landmark case here. A farmer growing wheat on his own land, to feed to animals on his own land, all in the same state, is considered interstate commerce. The supreme court decided that the test is not about whether it is really interstate commerce, but if the activity exerts a substantial economic effect on interstate commerce.

[Retric]

You can’t see internet across state lines. You can sell wheat across state lines, which seems like a major difference.

The heathcare system is another example of this. Emergency rooms in Texas are useless to people in Florida.

[pas]

Yet the ACA (Obamacare) was held constitutional due to the Commerce Clause.

Sure, if the ACA would regulate non-economic aspects of ER visits, those parts would have been likely struck down. (Unless otherwise authorized by the Constitution.)