Sanders has won some of his biggest margins with white men, while Hillary Clinton has won big with African Americans. They might tell you where they can most win in the primaries coming up.
The Vermont independent won the Michigan primary, in part, because of strong support from white men, upset about stagnant wages and jobs sent offshore. Now, that demographic could help him win Ohio.
Sanders has a steep hill to climb to win enough delegates in the presidential primary. But he doesn't seem deterred, telling NPR, "I am used to climbing steep hills."
More than 300 delegates are at stake. Michigan is the state to watch. Sanders has a chance to start to reverse the narrative — and Trump needs to quell conversation of a brokered convention.
An NPR analysis finds one very rosy scenario for Sanders in which he comes out with the majority of pledged delegates. But the possible results range from Sanders plus-1 to Clinton plus-151.
Donald Trump and Hillary Clinton are expected to up their delegate leads and pull away from their rivals. But those aren't the only things that could happen. Be ready for surprises.
It's the day when the most states vote and the most delegates are at stake. It can be determinative in who becomes the presidential nominee for either party.