The definitive book on President Obama's historic nuclear deal with Iran from the U.S. foreign policy expert and acclaimed author of Treacherous Alliance. In Losing an Enemy, Middle East policy expert Trita Parsi examines President Obama's strategy toward Iran's nuclear program and reveals how the historic agreement of 2015 broke the persistent stalemate in negotiations that had blocked earlier efforts. The Joint Comprehensive Plan of Action, commonly known as the Iran nuclear deal, accomplished two major feats in one stroke: it averted the threat of war with Iran and prevented the possibility of an Iranian nuclear bomb. Parsi advised the Obama White House throughout the talks and had access to decision-makers and diplomats on the U.S. and Iranian sides alike. With his unique insight, he examines every facet of a triumph that could become as important and consequential as Nixon's rapprochement with China. Drawing from more than seventy-five in-depth interviews with key decision-makers, including Iran's Foreign Minister Javad Zarif and U.S. Secretary of State John Kerry, this is the first authoritative account of President Obama's signature foreign policy achievement. "A detailed and gripping account of the 22 months of negotiations over Iran's nuclear program that resulted in the 2015 deal."—John Waterbury, Foreign Affairs