Democratic presidential candidates Hillary Clinton, left, and Sen. Bernie Sanders, I-Vt., stand on stage during the National Anthem before a Democratic presidential primary debate at the University of Michigan-Flint, Sunday, March 6, 2016, in Flint, Mich.
(Carlos Osorio / AP)
Democratic presidential candidate Hillary Clinton awaits the start of the Democratic Debate in Flint, Michigan, March 6, 2016.
(GEOFF ROBINS / AFP/Getty Images)
Democratic presidential candidates Hillary Clinton and Bernie Sanders stand during the national anthem before the Democratic Debate in Flint, Michigan, March 6, 2016.
(GEOFF ROBINS / AFP/Getty Images)Advertisement
Democratic presidential candidate, Sen. Bernie Sanders, I-Vt., makes a point during a Democratic presidential primary debate at the University of Michigan-Flint, Sunday, March 6, 2016, in Flint, Mich.
(Carlos Osorio / AP)
Democratic presidential candidate Senator Bernie Sanders (D-VT) speaks as Democratic presidential candidate Hillary Clinton looks on during the CNN Democratic Presidential Primary Debate at the Whiting Auditorium at the Cultural Center Campus on March 6, 2016 in Flint, Michigan.
(Scott Olson / Getty Images)
