This post was updated at 1 p.m. ET
Senate leaders were all smiles Wednesday after they broke a 24-hour impasse and announced they had reached a deal on how to move forward on a fast-track trade negotiating bill. That legislation would give the president expedited authority to enter into a trade agreement with Pacific Rim countries, otherwise known as the Trans-Pacific Partnership, or TPP.
But how senators will vote on this bill depends largely on how they feel about TPP. And there's one problem.