Since "interstate commerce" has meant "that which crosses a state line" since the words were written, and includes the placing of "tarriffs" on imported goods -- at one time the sole source of US revenue, and since you said the Constitution gives "no power" to Congress over US trade with Cuba (which would cross at least one state line, perhaps several of them), you are self-evidently, blatantly, and totally wrong. Don't you get just a little embarrassed, wandering around in public with an electronic dunce cap on your head? Or do you spend all your time that way, and have grown to like it?
Congressman Billybob
New column up: "The Un-Music Man." You'll like this one a bunch.