But the U.S. has to be careful. If our strategy depends on Sunnis doing the fighting to clear Mosul and Ramadi - and, as near as I can tell, that is the strategy - then you have to be careful that Sunnis don't perceive the U.S. to be operating arm in arm with Iran or with Iranian-backed Shiite militias that Abadi - Prime Minister Abadi is using in Iraq, so that, in effect, we're fronting for Iran.