Jarrett Blanc is a senior fellow in the Geoeconomics and Strategy Program at the Carnegie Endowment for International Peace. He was previously the deputy lead coordinator and State Department coordinator for Iran nuclear implementation under president Barack Obama. In that role, he was responsible for the full and effective implementation of the Joint Comprehensive Plan of Action on Iran’s nuclear program, including Iranian and U.S. commitments on sanctions. Diwan interviewed Blanc in early August, before the reimposition of U.S. sanctions on the country following President Donald Trump’s decision last May to withdraw from the nuclear deal, to ask him about how he saw the deal’s future.