As Mr. Maliki resigns from the premiership in Iraq, a former aide says of his eight years as prime minister that Maliki never battled to preserve the state, only to preserve his own premiership. And other colleagues says he thrived on demonizing the Sunnis and the regular crises under his leadership. The new prime minister Mr. Abadi is also from the same Shiite Dawa party that Maliki belonged to, and it is not clear how is leadership will turn out. The final push for Maliki's ouster came from Ayatollah Sistani of Iran. The U.S. and western allies also pushed for a new leader. The use of sectarian Shiite militias by Maliki to fight the Sunni insurgents from ISIS in 2014 further aggravated Iraq's religious divide.