I keep wavering on this. In general I would agree, but if the war starts on, say, October 15th, and then it turns out Saddam had already managed to smuggle some WMDs into the US and uses them in a couple of large cities and kills 10,000 people, it might not be the best thing for the GOP's poll numbers. On the other hand, if we bet right and he hasn't managed to smuggle jack into the country, and we really kick ass 1991-style, it's pretty much a guaranteed recapture of the Senate and meaningful gains in the House.