"...Commerce Clause that many defend."
I would hope that we would all defend the Commerce Clause -- it is part of the Constitution. We can argue about the misapplication of the Commerce Clause to justify certain laws.
Lastly, many on this board ask the question, "Point out the part of the Constitution that authorizes the Congress to do _________". If the answer is the Commerce Clause, it doesn't mean that one agrees that it is a proper application of the Commerce Clause. It just means that is where Congress got it. Don't confuse a factual answer with a person's position on that issue.