Brett McGurk, the Man Who Built Coalition to Fight ISIS, Quits Over Presidents ISIS Strategy - The Daily Beast

He was reportedly in the region meeting with allies in the anti-ISIS fight, such as Kurdish leader Masoud Barzani, and was caught off guard by Trump's announcement. ....
https://www.thedailybeast.com/brett-mcgurk-leading-us-envoy-in-global-isis-fight-quits-cbs