A big upset in Wisconsin. A progressive victory in Minnesota. ​And the enduring power of President Trump's endorsement. These were some of the emerging themes

A big upset in Wisconsin. A progressive victory in Minnesota. ​And the enduring power of President Trump's endorsement. These were some of the emerging themes after voters went to the ‌polls in Wisconsin, Minnesota, South Carolina, Connecticut, and Vermont in one of the last big primary nights befo…