When Hassan Rouhani secured the Iranian presidency in the summer of 2013, he carried a mandate that set him sharply apart from his hardline predecessor: a promise to ease the country’s isolation through a historic nuclear accord. Eight years later, as he handed power to a conservative rival, that vision lay in tatters. The story of Rouhani’s tenure offers for Americans a concrete case study in both the possibilities and the brittle limits of engaging a regime where the final word on national security rests not with the president but with the Supreme Leader.
The Rise and Fall of a Moderate Vision
Rouhani, a cleric with a reputation for pragmatism, served as Iran’s president from August 3, 2013, to August 3, 2021. His signature achievement was the Joint Comprehensive Plan of Action, commonly known as the Iran nuclear deal, signed on July 14, 2015, between Iran and six world powers.
The accord emerged from years of deadlock over Western fears that Tehran was pursuing nuclear weapons capability — a charge Iran consistently denied, insisting its program was peaceful. Under the deal, Iran agreed to cap uranium enrichment, reduce its stockpile of enriched material, and grant international inspectors access to its nuclear sites. In return, the United Nations, the European Union, and the United States lifted many nuclear-related sanctions, though U.S. penalties targeting Iran’s ballistic missile program and support for armed groups remained in place.
For a period, the arrangement appeared to function as intended. It took effect in early 2016, and compliance reports from international monitors showed Iran meeting its commitments.
Supporters of the agreement argued it was the most viable path to block Iran from building a nuclear bomb without triggering a war. Critics, including Israel, Saudi Arabia, and many Republican lawmakers in Washington, countered that the JCPOA failed to address Iran’s ballistic missile work or its destabilizing activities across the Middle East. Then, in May 2018, the Trump administration withdrew the United States from the pact.
Washington reimposed sweeping sanctions that cut off much of Iran’s access to the global financial system — a move that effectively gutted the economic benefits Tehran had received under the deal. The Trump administration argued that the original agreement was flawed because it did not constrain Iran’s ballistic missile program or its regional aggression.
For Rouhani, the practical consequence was immediate and severe: hardliners who had always opposed the accord saw their moment to intensify domestic pressure on the moderate president.
A Cascade of Crises
Tensions escalated sharply in June 2019. On June 20, Iranian forces shot down a U.S. RQ-4A Global Hawk drone.
The Trump administration ordered a retaliatory military strike but called it off at the last minute. Separately, a series of tanker attacks in the Gulf that same month raised fears of a wider conflict. Rouhani denied Iranian involvement in those attacks, instead blaming the United States for escalating tensions. The pattern was unmistakable: the moderate president was losing his grip on the narrative both at home and abroad.
Rouhani’s presidency ended with the election of Ebrahim Raisi in June 2021. Raisi, a hardliner backed by the Supreme Leader, won a low-turnout contest that many Iranians viewed as rigged.
For Rouhani, it was a bitter conclusion to eight years of trying to open Iran to the world. The collapse of the nuclear deal reshaped Iranian politics, empowering conservative forces who argued that negotiation with the West was futile. In response to the U.S. withdrawal, Iran gradually began exceeding the deal’s limits on uranium enrichment, pushing its program closer to weapons-grade capability.
Implications for American Policy
For American readers, Rouhani’s trajectory carries a clear caution. The Iranian system concentrates ultimate authority in the Supreme Leader, which means even a relative moderate in the presidency can only advance diplomacy so far.
The JCPOA was, in this sense, a fragile structure: once the United States withdrew, the entire arrangement collapsed. Efforts to revive the agreement in subsequent years have repeatedly stalled. The fate of the nuclear deal remains a central test of whether engagement or pressure will define the standoff between Iran and the West.
The history matters now because the accord’s collapse affected energy markets, regional security, and the risk of a new nuclear crisis. Any future diplomatic initiative with Tehran, the record suggests, must account for the structural reality that the president is not the real decision-maker on core security questions.
The lesson that Rouhani’s presidency offers is that a contract can be written, signed, and even honored for a time — but if the political architecture around it shifts, it can be undone. For U.S. policymakers, understanding that dynamic is essential to calibrating any future approach to the Islamic Republic.
