His decision to leave Iraq after it had been pacified was unbelievably stupid. It just was. We had the chance to bring American business into the country and build it into a prosperous democracy ala South Korea, another dirt poor country with no history of democratic government.
Instead he says "we leave behind a stable, democratic Iraq" and pulls out. That power vacuum was what caused the ISIS explosion which has since spread and he has no idea what to do about it.
Right now he's just stalling until January.