I think it is pretty easy to see that Bush, all protests to the contrary notwithstanding, has set a timetable for withdrawing troops from Iraq.
It's the day after his presidency ends.
At that point, he doesn't give a damn what happens to Iraq, the soldiers or the US. He'll be free and clear, having manipulated things to try to keep himself and his fellow war crimes planners - Rumsfeld, Cheney, Rice, et. al. - from being held accountable for the willful murder of innocents. He doesn't actually give a damn about the people whose lives he has destroyed right now, either, but once the term of office is done, he can stop even pretending to pretend that he takes it seriously.