Main article: Comprehensive agreement on the Iranian nuclear program

On September 27, 2013, Obama spoke on the phone to Iran's President, Hassan Rouhani, which included talk about resolving the dispute over Iran's nuclear program.[298] By July 2014, Iran had accepted the limits imposed on a nuclear deal,[299] and by April 2015, a specific and comprehensively detailed nuclear outline had been agreed upon, in which Obama referred to as “a historic understanding with Iran.”[300] The Iran nuclear outline is an ongoing negotiation, but the White House is making all efforts to ensure that Iran does not have access to nuclear weapons.[301]