Sanders counted on a loyal base and a crowded 2020 field. But his base was smaller and the party less divided than he expected.
Trump last week said he wanted to see the much of the country opening back up by Easter.
The legislation, which was passed unanimously by the Senate on Wednesday, provides relief for workers and businesses that have been devastated by the outbreak.
Analysis: The two candidates offered contrasting visions on handling the coronavirus and clashed over their past records.
Analysis: The first one-on-one faceoff of the Democratic primary season arrives Sunday amid a dramatically transformed campaign landscape.
It's not as super as Super Tuesday, but 352 delegates are up for grabs as Biden and Sanders do battle.
"This is why we get do-overs," said one former Trump voter.
With money from the national party, state Democrats aim to expand their voter rolls in a bid to flip the state from red to blue this November.
Stocks across the world have cratered amid the spread of the coronavirus.
The Working Families Party was one of the first big progressive groups to back Warren. It's now calling on her supporters to rally behind Sanders.
First Read is your briefing from "Meet the Press" and the NBC Political Unit on the day's most important political stories and why they matter.
Booker joined Pete Buttigieg, Amy Klobuchar, Kamala Harris and Mike Bloomberg, who have endorsed Biden in recent days.
Harris joins Pete Buttigieg, Beto O'Rourke, Amy Klobuchar and Mike Bloomberg, who've all endorsed Biden in recent days.
Results from Super Tuesday show that Joe Biden can tap into a strong wave of support from Democrats.
"I have long known and worked with Mark, and the relationship is a very good one," Trump tweeted of Meadows. Mulvaney will become U.S. envoy to Northern Ireland.
Officials had tested 46 passengers on the cruise ship, which has over 3,000 people aboard.
The key Midwest state goes the polls on Tuesday as Biden and Sanders duel for delegates.
For the first time, it will be just Bernie Sanders and Joe Biden on stage at a debate, which takes place on Sunday, March 15, in Phoenix.
The Utah Republican had expressed reservations about the subpoena as well as the Senate GOP investigation into the Bidens and Burisma.
After losing his delegate lead on Super Tuesday, the progressive populist is weaponizing a policy difference with the moderate former vice president.
"They have no intention of abiding by their agreement," one official said. Trump said Friday, "Countries have to take care of themselves."