Via the comments, the details emerging around John McCain just make him look worse and worse:
Woods said “it hurts” McCain to vote against legislation like the Dream Act after years of working on reform but said the senator felt betrayed when Latinos overwhelmingly supported Obama in 2008. “When you carry that fight at great sacrifice year after year and then you are abandoned during the biggest fight of your life, it has to have some sort of effect on you,” he said.
So then he screwed them because his feelings were hurt and proved them right about their instincts in 2008.
There ought to be a law against sociopaths serving in the Senate, but I’m really not sure they could get anything done with only Bernie Sanders and Sherrod Brown (and a few random others).