Iraq's new prime minister faces 'mission impossible' over Iran

Iraqi billionaire Ali al-Zaidi was confirmed as Iraq’s new prime minister on May 14, a full six months after elections. His emergence reflects his unique appeal to Washington, Tehran and Iraq’s bitterly divided political establishment. Alongside fiscal and social challenges, Zaidi faces a far more daunting test. He will need to appease three centers of power with diametrically opposed visions for the future of Iran-backed militias operating outside of government control. Tehran wants them elevat...