Other Republicans, especially those in the Senate and the House, will find that they simply cannot stay in support of this occupation through November 08. The White House won't like to bring the troop force down, but they will have to start that process before the election. And the Democrats will be obliged to continue to press for withdrawal. All that because of popular opinion. Democracy, for all its flaws, has one big thing going for it: the people feel empowered, and that makes their opinions valuable.
I highlight quotes like this because there has been, since after the '04 election, this weird faith in the fact that electoral politics would cause the Iraq war to magically end itself. Some things are just more powerful than popular opinion.