Strange that he would write it one way, it gets ratified, then 50 years later he writes a private letter to an obscure friend saying, "Gee, I hope you don't think that to regulate foreign commerce means the same thing as to regulate interstate commerce".
Oh no, Mr. Madison, why would I?
BWAHAHAHA! I see you're now adopting a dismissive attitude toward one of the Founding Fathers. A tacit admission that your view and Madison's are not in acccord?
(I wouldn't be the first person to disagree with Madison, you know.) We're in accord -- as to what he put down in the constitution.
But then Madison is silent on this issue for 50 years. Then he writes this private letter, not to Chief Justice Marshall who's having a field day with the Commerce Clause ... oh no ... to some Cabell guy who, according to inquest, already understood what Madison was trying to explain.
So I'm dismissive of the letter, and you can't understand why I would be?