How Detroit debates proved challenges of crowded 2020 field

Night two of the Detroit Democratic debate may have opened with a handshake between former Vice President Joe Biden and Sen. Kamala Harris, but there was no shortage of attacks on either of them during the course of the evening. Judy Woodruff talks to Stuart Rothenberg of Inside Elections, Amy Walter of the Cook Political Report and Karine Jean-Pierre of MoveOn.org for highlights and analysis.