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.

When the big guys in Washington dream of transforming the world, it’s the little guys who come home in body bags.

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

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.

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.

Luck is the residue of good planning.

Retrospective analysis is not a useful guide to current problems.