U.S. has been trying to encourage Iraq to pass a law that would provide money and training and weapons for a Sunni national guard that could be effective in places like Ramadi, like Mosul

Well, I think the U.S. has been careful not to go too far in attacking Iran's allies, in particular in attacking Hezbollah forces in Syria, which have been propping up the regime of Bashar al-Assad.

It's very hard to understand just what our strategy is in Syria, frankly, and on Iraq that this is Iraq's war, that the role of the United States is to help Iraq, to arm, train, support, provide air support, but this has to be Iraq's war.

Iran is also engaged in the fight against ISIL for reasons of its own that include a desire not to see a reasonably friendly government in Baghdad falling. But it also includes its desire not to have ISIL's ideology spread in the region where it lives

A change of strategy suggests there is a strategy. I don't see a strategy that deals with - that concerns with dealing wit with ISIL overall. There is some sort of strategy for dealing with it in Iraq. I'm not sure there is one in Syria. And Libya is another problem altogether.

I believe, that there is at least de facto cooperation between United States and Iran, at least in Iraq.

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.