Iraq’s new prime minister has promoted a general who played a major role in crushing ISIS and who is also widely seen as a counterweight to Iranian influence. Lt. Gen. Abdul Wahab al-Saadi has been named commander of Iraq’s Counter-Terrorism Service, which took heavy casualties during the fight for Mosul, according to the Associated Press. Al-Saadi previously served as deputy commander for the counterterrorism force, which was trained and equipped by the U.S. military. The Counter-Terrorism Service is considered the best disciplined and least sectarian element of Iraq’s military and police force. As such, it is a bulwark against Iran,...