He was already one of the most incisive critics, not just of the Iraq War, but of American foreign policy generally. Now, I wouldn't be surprised to find him in a tower with a rifle, frankly.
Will this cause any of the pro-more-dead-Iraqi caucus to reconsider their stand? Will it cause them to even, for a moment, reconsider accusing sane people of "abandoning the troops"? The answers can only be assumed to be no, and no.