The "UIGEA is unconstitutional" argument is a loser

[Skallagrim]

As my lunch hour is almost over, I decline to go researching for more cases. The porn cases previously cited already demonstrate the point you seem to miss: commerce that occurs interstate can ONLY be regulated by the Federal Government. You are completely wrong, as I recall from 1st year law school, to state that "it is fine for the Federal government to explicitly defer an issue to state regulation from a DCC perspective" if the issue is an issue of interstate commerce.

If you think I am wrong, cite one case please that supports the above quote.

Or, as a refresher course on the commerce clause, google "interstate wine sales" and you will find a recent case in which the US Supreme Court overturned state laws that required out of state wine shippers to obtain some sort of in-state license or similar thing.