that much is certain. But here's a tack he can take that allows him to stake out a solid criticism of Bush's war, not as he has so far, merely parroting Bush's mantra of "staying the course."
He could fire high-power bullets at the administration's rush to war in Iraq--Cheney's war--by charging that it has been under-equipped, crony-run, and administered by goofballs, all because Bush couldn't wait for the UN inspectors to finish their task. This was, after all, an optional war and we've blundered into it without preparation and planning. He should hammer and hammer on this theme until Bush/Cheney bleeds.