The Biden camp has closed its Philly HQ to the public over coronavirus concerns.

He told reporters in Burlington, Vermont, on Wednesday that he's not quitting despite key primary losses to Joe Biden the night before.

Joe Biden and Bernie Sanders both canceled rallies in Cleveland Tuesday night, hoping to avoid spreading coronavirus. Biden went to Philly instead.

Joe Biden delivered decisive wins in Missouri and Mississippi on Tuesday, dealing an early blow to Bernie Sanders

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 Big Tuesday.

To the very end, Elizabeth Warren had a plan for that. In her last days as a candidate, she was still releasing new plans — including a coronavirus plan outlined on Saturday.

The big picture on election security in the 2020 campaign after Super Tuesday: Could be worse — but also could be better.

Elizabeth Warren, who electrified progressives with her “plan for everything” and strong message of economic populism, dropped out of the Democratic presidential race.

Billionaire Mike Bloomberg ended his bid for the Democratic presidential nomination on Wednesday and endorsed former Vice President Joe Biden.

Suddenly, the Democratic Party’s presidential field, which featured more than a half dozen candidates a week ago, transformed into a two-man contest.

Voters seem split on the question of a fracking ban.

Fourteen states hold contests today, with about a third of all delegates for the Democratic nomination at stake.

Minnesota Sen. Amy Klobuchar is suspending her presidential campaign after failing to break into the top tier of Democratic candidates.

Joe Biden scored a victory in South Carolina’s Democratic primary on Saturday, riding a wave of African American support and ending rival Bernie Sanders' winning streak.

Follow NPR’s coverage right here to learn what’s at stake, see what it looks like on the ground and track live results Saturday evening.