Your daily look at late-breaking news, upcoming events and the stories that will be talked about today:
1. MICHIGAN PRIMARY TESTS TRUMP’S DURABILITY WITH WHITE, WORKING-CLASS VOTERS
Mississippi, Idaho and Hawaii are also holding Republican contests, while Democrats Hillary Clinton and Bernie Sanders face off in Michigan and Mississippi.
2. CAN TRUMP BUILD HIS PROMISED BORDER WALL AND MAKE MEXICO PAY
Big bureaucratic, diplomatic, environmental, monetary and logistical hurdles must be overcome.