And I'd like to add that I also believe that the top party leaders have also seen more evidence that we haven't even heard about. Why else would the Dems be caving? This resolution will easily pass- with only a handful of Dems saying no.
Even if they hadn't, they run the risk that WHEN we are attacked again that any connection (and their will be some connection) either direct or indirect to Iraq will spell their complete defeat as a viable national party. After all the 20/20 hindsight stuff they imposed on Bush will come back to destroy their credibility.
Can you imagine Bush in front of a photo of a destroyed nuclear plant saying that "I could of got the crawdad in his hole if I was just given the authority".