Elaine Kamarck, senior fellow and founding director of the Center for Effective Public Management at the Brookings Institution, talks with Brookings Institution Press Director Bill Finan about the third edition of her book, "Primary Politics: Everything You Need to Know about How America Nominates Its Presidential Candidates." She explains how the modern primary system differs from that of an earlier age, how the old system would have never resulted in a Trump primary victory, how Clinton and Trump actually won their races, and what to expect in 2020. Also in this episode, meet Alina Polyakova, a David M. Rubenstein Fellow in the Center on the United States and Europe at Brookings. Subscribe to Brookings podcasts here or on iTunes, send feedback email to [email protected], and follow us and tweet us at @policypodcasts on Twitter. The Brookings Cafeteria is part of the Brookings Podcast Network.