One or more could bolt, Chaffee is on the edge already. When you gain ground, you then consolidate your gains.
Don't let the door hit them in the butt. We have enough of a majority to let them go. Don't give me the BS of them all jumping.
If we kowtow to Specter and his ilk, we will be placating them for the rest of their careers. How many judicial appointments will we have to sacrifice on the alter of Specter and company to keep them in our party?