We only have to look at those that 'authorized' the Iraq invasion, avoiding all responsibility for the decision and pushing it up to the neocons in the Bush administration.    You'll find a lot of democrats on that list.    I don't for a second accept the excuse 'that Bush lied to congress'.     Sorry, but good people don't endorse a war without being sure of the facts.   

The authorization was the rubber stamp of a pathetically weak congress, afraid to look unpatriotic, or worse, moved down the food chain of political contribution funnelled through The Party.