So now what? Barney and Laura still support him, so the war must go on? We need a few extra innings of Calvinball? The timetable that Bush considered so unacceptable is not only supported by a large majority of Americans and a smaller (but very significant) majority of Congresspeople, the deadline is also well past the point in time when even the surge supporters say we will know whether there's any hope, and for that matter it's not terribly harsh in its constraints. The country and its leaders are pleading with the President to, at the very least, provide us with a dim candle at the end of this heinous tunnel, and he is saying in so many words, "Fuck off, the tunnel might not have an end."
His stubbornness is clinical. In many cases it's not wise to change horses in midstream, but if you picked a horse that is now drowning, and pulling you down with it, you don't really have a choice. Not only that, but in this war (as in any war) there's no single horse that can get you all the way across the stream; there's no such thing as a strategy that will work for an entire war if only you maintain absolute adherence. Most of America appears to know this, but Bush is staking lives on the hope that maybe, just maybe, the stream will somehow dry up before his chosen horse drowns.