Here's a Guardian column on Bush's Asian analogies speech. I'll quote my own conclusion, then you can follow the link and see the reasoning:
For months now, many conservatives have been fundamentally positioning themselves for the post-war era, readying the arguments that will blame the failure of the venture in Iraq on its opponents rather than its architects. That Bush himself has chosen to join them is, perhaps, on some level the clearest reflection of the reality that the president knows perfectly well that the war is unwinnable, and blame-shifting now the best hope for saving his historical legacy.
While you're there, check out Spencer Ackerman on Carl Levin's irresponsible Maliki-bashing.