Iran’s leadership is split over whether to continue its support for Iraqi Prime Minister Nouri al-Maliki, according to senior U.S. officials involved in Baghdad’s political process.

The Obama administration has aggressively been pressing Iraq’s political parties to quickly form a new national government to unify their country’s Shiite, Sunni and Kurdish communities in the fight against the Islamic State, a Sunni militia that’s gained control of large swathes of western Iraq in recent months.