Reply #100: Because his vote is the difference between passing and not passing.

[Political Heretic]

Oh wait.

Yes, of course he's trying to get elected. Which is why he is going to speak out against immunity (as he has been doing), work to take it out, and if that doesn't work vote for it because its absolutely stupid not to on a bill that has more than enough votes to pass anyway and simply HAND the GOP their attack points in your vulnerable area (national security/foreign policy)gift wrapped with a note that says "please use this against me to paint me as naive, inexperienced, soft on terror, out of touch on security and weak from now until November! Love, Barack."