Biden and Sanders prepare for 1st head-to-head primaries

Voters in six more states will head to the polls Tuesday in the 2020 Democratic presidential primary -- which is now essentially a two-man race between former Vice President Joe Biden and Sen. Bernie Sanders of Vermont. Michigan is the largest delegate prize, and Sanders, who won the state four years ago, is trailing Biden in polls there by around 15 points. Yamiche Alcindor reports.