We talk with Professor Susan Kang about Alexandria Ocasio-Cortez's huge primary win over Congressman Joe Crowley. We ask: How did this happen? Why now? What does this mean for other left-wing candidates around the country? Susan Kang is an associate professor of political science at John Jay College, City University of New York. She is the author of Human Rights and Labor Solidarity: Trade Unions in the Global Economy. Professor Kang a member of the NY citywide leadership committee of the Democratic Socialists of America.