The Republican bargaining habit is well-established -- take Obama's "final" offer as the new starting point and demand further concessions. With this strategy, our president has let them take him to the cleaners for more than four years now, and is still hoping that sweet reasonableness will produce compromise. It never has and never will. If Democrats stand for anything, it is defense of Social Security and Medicare -- America's two most broadly beneficial and most beloved government programs -- and the president just gave away this last bit of product differentiation. In the past, Republicans have saved Obama from himself by refusing to consider any tax hikes. Now, I'm beginning to think, it's time for Democrats save him from himself. And the Democratic Party. And us.