A man stands in the doorway to cool down at Precinct 15 in Flint, Mich., during the primary election on Tuesday March 7, 2016. Presidential candidates in both parties were looking to Michigan on Tuesday for one of the largest delegate hauls in the bruising nominating contests. (Ryan Garza/Detroit Free Press via AP) DETROIT NEWS OUT; TV OUT; MAGS OUT; NO SALES; MANDATORY CREDIT DETROIT FREE PRESS