Voters in 6 primary states face Biden vs. Sanders matchup

Residents of six states head to the polls Tuesday to cast ballots in the 2020 Democratic presidential primary. The two leading candidates, former Vice President Joe Biden and Vermont Sen. Bernie Sanders, are battling for a total of 352 delegates. John Yang reports and Judy Woodruff gets updates from Politico’s Tim Alberta, Mississippi Today’s Adam Ganucheau and Donna Blankinship of KCTS 9.