Look at Kosovo, many conservatives questioned our involvement. Once the war started, there were not a bunch of conservatives screaming about 'where are the mass graves' or 'Clinton lied, people died' or kept debating the issue on any grounds. Once the war started, conservatives did unite behind not only our troops but our mission. Many may have felt it was misguided, but once involved are there to win. Liberals today cheer when our troops die and cheer the prison scandal.
Kerry will pull out as soon as possible. Iraq will not descend into "chaos". It will become an Islamic extremist state and all of its contracts for reconstruction and weapons purchase will go to the French.
This will be called a foreign policy success, re-establishing America on the moral high ground globally. In the meantime, the Chinese will sign an agreement with Iraq for unlimited oil access.