WASHINGTON, March 11: Joe Biden decisively won Michigan’s Democratic presidential primary on Tuesday, seizing a key battleground state that helped propel Bernie Sanders’ insurgent candidacy four years ago. The former vice president’s victory there, as well as in Missouri, Mississippi and Idaho, dealt a serious blow to Sanders and substantially widened Biden’s path to the nomination.

COLUMBIA, S.C., March 2: Bernie Sanders’ presidential ambitions were undone in 2016 when he couldn’t line up enough support from black voters to win the Democratic nomination. As he tries again in 2020, results from South Carolina suggest he’s still struggling to appeal to the voters who make up the backbone of the Democratic Party.