Elizabeth Warren gains momentum as Bernie Sanders slips: what's next for the two progressive candidates?

06:02

Elizabeth Warren is gaining traction as Bernie Sanders sees his grip on a key state starting to slip. Is there room in the crowded primary field for two progressive candidates? Former Deputy Assistant Secretary of State and Spokesman for Hillary Clinton Philippe Reines and PBS NewsHour White House Correspondent Yamiche Alcindor join Craig Melvin to Discuss.