In this episode of Intelligence Matters, host Michael Morell has a wide-ranging conversation with Jake Sullivan, former senior policy adviser on Secretary Clinton's 2016 presidential campaign and national security adviser to Vice President Joe Biden. They discuss key lessons learned from Russia's 2016 election interference, the Obama administration's response, and how future political leaders should be thinking about the presidency. Sullivan, who was deeply involved in brokering the 2015 Iran nuclear deal, discusses the Trump administration's opportunities for dialogue with Tehran, and shares his views on North Korea, Russia and other foreign policy challenges facing the United States.