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Joe Biden increased his delegate lead with the March 10 primaries, and a top Democratic super PAC concluded he's on track for the nomination. Bernie Sanders didn't say what's next for him.
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The former vice president's win in Michigan, in particular, has solidified Biden's place as the front-runner to be the Democratic nominee.
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Bernie Sanders' supporters are making a big push in what could be the senator's last opportunity to regain front-runner status.
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As vice president, Biden visited Detroit nearly a dozen times, more than President Barack Obama. He was in Detroit again on Monday, this time campaigning before Michigan's Tuesday primary.
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Idaho, Michigan, Mississippi, Missouri, North Dakota and Washington state are holding 2020 primary contests on Tuesday. Follow live coverage and see the latest results.
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Tuesday's contests offer 352 delegates among six states. Michigan is the biggest prize, and it could be another pivot point in this Democratic primary.
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An incident on Super Tuesday has raised questions about why the agency isn't protecting the Democratic presidential candidates.
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An NPR analysis of 1,200 counties across five key demographics offers a first look at how a diverse swath of the country is voting so far in the Democratic presidential primary race.
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Vermont Sen. Bernie Sanders acknowledged this week that the young voters he's been counting on to boost his candidacy have not shown up at the polls in the strong numbers he had been hoping for.
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Warren occupied an awkward place in the field. She was popular enough to draw those big, loud crowds but wasn't able to mount a serious challenge to the front-runners.