Tehran’s nuclear ambitions, support for terrorism, and repression of its own citizens has long ranked it at the forefront of U.S. security interests in the Middle East and across the world. The election of a new president does not alter any of those concerns or priorities, but the campaign and the outcome does offer the possibility of new momentum in addressing them. This testimony addresses the significance of elections and the role of the presidency in the Islamic Republic, the political ramifications of the campaign and the victory of Hassan Rouhani for Iran, and the implications for the interests and policies of the United States.