Yeah, I am sure they will keep their word...
Michigan Senator Carl Levin made a similar statement last month, saying, "We're not going to vote to cut funding. Period."
Levin has, for along time, been playing the "bad cop" in an effort to use the "good cop/bad cop" tactic to influence the Iraqi leadership. He has openly admitted doing so (Google this to find multiple references:senator "carl levin" "bad cop").
I don't care for his politics, and it wouldn't affect his re-election, but, IMHO, I think Levin (unlike Reid)has too much class to cave on this. I know he had to have had some discussions with Reid over what Reid just did, but it would really surprise me if he caved.