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EAST LANSING, MI - MARCH 02: Democratic presidential candidate Senator Bernie Sanders (D-VT) arrives for a rally on the campus of Michigan State University on March 2, 2016 in East Lansing, Michigan. Voters in Michigan will go to the polls on March 8 to select their partys presidential nominee. (Photo by Scott Olson/Getty Images)

EAST LANSING, MI - MARCH 02:  Democratic presidential candidate Senator Bernie Sanders (D-VT) arrives for a rally on the campus of Michigan State University on March 2, 2016 in East Lansing, Michigan. Voters in Michigan will go to the polls on March 8 to select their partys presidential nominee.  (Photo by Scott Olson/Getty Images)