The important point on the Republican story is the reason for getting concerned about the war. It's not because this administration has botched just about ever phase of it. No it is because:
Iraq is risking the future of the Republican Party and that he [Bush] cannot count on GOP support for many more months.
In other words the GOP is covering its ass.
Again September seems to be the magic month for deciding on the success of the surge. The Republican goal is to neutralize Iraq as a campaign issue next year. I cannot see how this is going to be possible. No matter what type of reports come in on the surge in September, Bush is not going to voluntary withdraw troops. And unless Congress has the guts to cut off funding, which is as far as I can see is only going to endanger the troops, the war will continue until there is a new president.