They haven’t given up their power to reject. If it’s bad, you reject.
The Pro-Free Market Congressmen increased their power because they can demand certain things in and demand certain things out, or it’ll just be voted down from the get-go.
Obama has gained no powers from this. That is a myth. That is sheer hyperbole.
Then why did they bother to vote on it in the first place? Because they granted him fast track powers, powers he did not have prior to the vote, powers which required a vote to grant. How is that an exaggeration?