"Fast Track" {Trade Promotion Authority} turns the separate Constitutional authority granted to Congress and the President upside down and backwards. The idea of administration "Fast Track" authority on foreign trade epitomizes the government envisioned by Orwell in his "1984" prediction{?}. Being a well educated lawyer, you MUST know that. What's the deal?? Peace and love, George.
If your interpretation were correct, we could have hundreds of Congressmen each negotiating on behalf of the United States with foreign countries.
That's not feasible and it's not what the Constitution requires. Congress enacts laws and it has oversight of Executive Branch activities.
There's a reason why Congress approves of Cabinet appointments. It is to empower them to conduct the business of the United States, including our discourse with foreign nations.
Yes, I am a lawyer and I have a very keen interest in the Constitution. There are many things that the Government does which it has no constitutional authority to do. Fast Track is NOT one of those.