For example, "interstate commerce" means a product or service has to cross state lines for the Feds to have a say. Raich is hogwash, and if I want to make firearms (or aspirin or cars or whatever) and offer them for sale only within my state, tough noogies for the Feds.
Might this make it harder to have 'national' standards? Sure, but so what? Our liberty is more important than standardization and economy of scale.
We agree.
That would seem an obvious choice, but Wickard vs. Filburn says otherwise.
Brief summary: "By not engaging in interstate commerce, you are affecting interstate commerce, and the Fed. gov. can regulate you."