ISIS Fighters in Syria Are Trying to Push Into Iraq, Where U.S.-Backed Forces Can’t Get Along With Militias Supported by Iran - The Intercept:

In Al Qaim, Iraq's U.S.-backed security forces and the Iran-backed Popular Mobilization Forces are increasingly distrustful of each other.....
https://theintercept.com/2019/01/18/isis-iraq-syria-us-iran/