What's at stake for 2020 Democrats during Detroit debates

During the first night of the Democratic debates in Detroit, the ideological rift within the crowded field was on full display. Moderates challenged progressives as being unrealistic, while the more liberal candidates said the party should embrace “big ideas.” Amna Nawaz talks to Stuart Rothenberg of Inside Elections, Amy Walter of the Cook Political Report and Karine Jean-Pierre of MoveOn.org.