Biden Wins Primaries in Idaho, Michigan, Missouri, Mississippi The former vice president is on track to secure the Democratic Party’s presidential nomination. March 10, 2020April 17, 2020 Bernie Sanders (Michael Vadon) Joe Biden (Phil Roeder) Former vice president Joe Biden won four of the six states that held Democratic presidential primaries on Tuesday. He is neck and neck with his rival, Bernie Sanders, in North Dakota and Washington state. 365 out of 3,979 delegates were at stake. Results 1,991 delegates needed to win the nomination. Analysis Why Biden is the frontrunner: He is ahead in delegates, popular support and party endorsements. What’s next for Sanders? The rest of the March doesn’t look good for him.