Democratic presidential candidate Sen. Bernie Sanders, I-Vt., speaks at a campaign rally at The Family Arena Monday, March 14, 2016, in St. Charles, Mo.
Democratic presidential candidate Sen. Bernie Sanders, I-Vt., speaks at a campaign rally at The Family Arena Monday, March 14, 2016, in St. Charles, Mo. Jeff Roberson AP
Democratic presidential candidate Sen. Bernie Sanders, I-Vt., speaks at a campaign rally at The Family Arena Monday, March 14, 2016, in St. Charles, Mo. Jeff Roberson AP