From the Daily Northwestern, here‘s a paraphrase from James Carville given during a speech in Chicago:

But Carville added that no one in Washington likes anyone who is right too often. Howard Dean’s accurate assessment about the failure of the war in Iraq helped kick him out of the running for president despite his passion, Carville said.

If that’s an accurate portrayal of what he said, I’d say that’s a pretty poor assessment of what doomed Dean’s candidacy. I’d say it was more for his likelihood to say stupid things.