There's only about 180 in Congress who don't support it.
And, of course, the Party Leadership (Boehner, Pelosi) always, always vote in favor of War, War funding, and pressure and blackmail the other members to "fall in line".
It would take something quite unprecedented for the Party Bosses to suddenly become pacifists.
Meanwhile, Obama has already indicated that he'll bomb regardless of the outcome of those votes. Unlike the U.K, in the United States War Powers are always the prerogative of the President (i.e., whatever the Joint Chiefs, the CIA, and the Bankster-Globalists want him to do).
So don't expect to be saved by Congress....