Iran–United States relations during the Obama administration

Iran–United States relations during the Obama administration (2009–2017) were defined by a shift from confrontation to cautious engagement, culminating in the landmark nuclear agreement of 2015.

At the start of Obama's presidency, both sides exchanged public messages signaling a possible thaw, with Iran voicing long-standing grievances and the United States calling for mutual respect and responsibility. However, after Mahmoud Ahmadinejad's disputed re-election in 2009, which sparked mass protests and allegations of fraud, the United States responded with skepticism and concern. In late 2011 and early 2012, Iran threatened to close the Strait of Hormuz and warned a U.S. aircraft carrier not to return to the Persian Gulf. The U.S. rejected the warning and maintained its naval presence, while experts doubted Iran’s ability to sustain a blockade.

The 2013 election of President Hassan Rouhani, seen as a moderate, marked a shift in tone, with his outreach at the UN and a historic phone call with Obama signaling renewed diplomatic engagement. While high-level contact resumed and symbolic gestures were exchanged, conservative backlash in Iran highlighted internal divisions over rapprochement. In 2015, the United States and other world powers reached the Joint Comprehensive Plan of Action (JCPOA) with Iran, under which Iran agreed to limit its nuclear program in exchange for sanctions relief. The agreement marked a major diplomatic achievement for the Obama administration, though it faced skepticism in Congress and mixed public support in the U.S.

Despite the JCPOA, tensions between the United States and Iran persisted over ballistic missile tests, continued U.S. sanctions, and European business hesitancy due to fear of U.S. penalties. The administration also faced criticism for its handling of these issues, both from Iran and from political opponents.