For the past 50 years, the Treaty on the Nonproliferation of Nuclear Weapons (NPT) has played a critical role in preventing the spread of nuclear weapons and reducing nuclear arsenals. Yet prospects for additional progress on U.S.-Russian arms control remain bleak, the Trump administration has split from key allies over the nuclear deal with Iran, and the denuclearization of North Korea remains uncertain. Kelsey Davenport, the Director for Nonproliferation Policy at the Arms Control Association assesses the possibility of a new nuclear arms race.