Domenico Montanaro

Former Vice President Joe Biden won the Florida, Illinois and Arizona Democratic primaries all by double digits Tuesday. And he's building a delegate lead that may very well be insurmountable.

Coronavirus is dominating. Three of four crucial states are going ahead with elections Tuesday that could determine the Democratic presidential nominee.

After the White House downplayed the coronavirus threat in the past month, the number of Republicans saying it has been blown out of proportion jumped, according to an NPR/PBS NewsHour/Marist poll.

The first one-on-one debate between the two men was supposed to be in Arizona, one of four states voting in the Democratic presidential primaries Tuesday. But it took place in a TV studio instead.

The coronavirus outbreak is having an impact on politics. On Capitol Hill, Democrats and Republicans are working to address the crisis, and presidential candidates have cut back on campaign events.

The former vice president's win in Michigan, in particular, has solidified Biden's place as the front-runner to be the Democratic nominee.

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.

Now that the presidential primary season is well underway, the picture is getting clearer for Democrats. More state primaries are to come — including Missouri and Michigan next Tuesday.

The presidential nominating contest is really a game of math: Which candidate can rack up the most delegates before the Party's convention? Here's how those delegates are awarded.

It was a surprise result for the former vice president, who won a majority of states on Super Tuesday. He rode a wave of momentum that may have catapulted him back into front-runner status.

In the Super Tuesday primary elections, polls have closed in Vermont, Virginia and North Carolina. Here are the latest results, and a reaction from the Bernie Sanders campaign.

The first polls have closed in today's Super Tuesday contests. Former Vice President Joe Biden is projected to win the Virginia primary, according to the Associated Press.

With 14 states voting and over 1,300 Democratic delegates on the line Tuesday, there's a lot to take in. But some key indicators will tell you what it means for the 2020 presidential campaign.

Fourteen states, a third of all delegates and an emerging race between Sen. Bernie Sanders and former Vice President Joe Biden. Here's what to know about the 2020 contests.

The former vice president won by nearly 30 points in South Carolina, giving him a big claim to being the principal alternative to Bernie Sanders for the Democratic presidential nomination.

The biggest day of the primary season began in the mid-to-late 1980s when Southern Democrats pushed their states to move up to try to stop whom they saw as liberal candidates who couldn't win.

The former vice president got some promising results in polling leading into the primary this week. But even with a win, he still has lots of catching up to do to hope to win the nomination.

During a news conference, the president struck a reassuring tone — saying it's not inevitable the virus will spread in the U.S. That's despite warnings to the contrary from public health officials.

Former Vice President Joe Biden fought to save his campaign, Vermont Sen. Bernie Sanders took fire from all sides, and more takeaways from the Democratic debate in South Carolina.

A lot is on the line in the 2020 primary debate. It might be the last chance for moderates to slow Bernie Sanders' momentum. And who comes out better — Joe Biden or Michael Bloomberg? Here's a guide.