Pure crap. Cong. is permitted to regulate ISC, not anything that might affect ISC. The standard is "substantially affect?" is it?? No, the standard is found in the US CONS, giving cong. the power to reg. ISC, not reg. something that might sub. aff. isc. Again, EVERY "local activities allowed nationwide" could affect ISC, therefore the G. has the authority regulate EVERYTHING in your book. NO. Cong. has the authority to reg ISC, not things that may affect, ISC, growing and selling my own dope is NOT ISC, no matter how much liberals and totalitarians would like to pretend otherwise.
There's no mention of ISC in the USC.
So Congress (via the FAA) may regulate interstate airline commerce, but may not regulate the private pilot flying into federally controled airspace?