Getting Republicans to sign onto a deal could enhance Obama’s personal brand. It would show him to be a serious “deficit hawk,” able to rise above partisan politics and cut a deal. But he would be helping himself at the expense of everyone else in the party. By giving the Republicans the political “out” they want on Medicare privatization, he could be dealing a devastating blow to everyone else in his own party who hoped to use the Ryan vote against their GOP opponents in 2012.