Donald Trump, who as a presidential candidate promised to focus solely on ISIS in Syria, has as president taken a surprisingly hard line on the Assad government. As ISIS loses strength and territory in Syria, the endgame of the civil war is drawing nearer and the various powers engaged in that struggle are shedding a common enemy. The result is a race to carve out spheres of influence—and the United States under Trump appears to be getting in on the action.
https://www.theatlantic.com/international/archive/2017/05/trump-syria-iran/527262/