I think you made my point. No agreement can supercede the Constitution, and we have a judiciary, executive and legislative that is still in control. If a provision is believed to be unconstitutional, then file a suit, as the lumber company did.
No your point has not been made.
The WTO is OBVIOUSLY superceding the Constitution. Where does the Constitution give an international tribunal authority to tax the American people? Where does it say that people who are not American citizens, are not elected by American citizens and do not operate UNDER the constitution can tax them?