Elizabeth Warren

President Trump is escalating his fight with Congress over a broad bipartisan effort to rename military installations named for figures from the Confederacy, threatening to veto an annual defense bill if it includes the provision.

The Senate is debating the National Defense Authorization Act, which already includes the provision backed by most members of the Senate panel. Meanwhile, a bipartisan group of House lawmakers is looking to add the change as part of ongoing negotiations for its version of the defense legislation.

Elizabeth Warren has now fully thrown her support behind former Vice President Joe Biden in the presidential race. She has even said, without question, that she would serve as his vice president.

Updated at 11:15 a.m. ET

Massachusetts Sen. Elizabeth Warren formally backed former Vice President Joe Biden for president on Wednesday, over a month after she ended her own campaign, extending a string of big endorsements as party leaders rally around the presumptive Democratic nominee.

"In this moment of crisis, it's more important than ever that the next president restores Americans' faith in good, effective government — and I've seen Joe Biden help our nation rebuild," Warren said in a tweet.

Updated at 10:58 a.m. ET

Mike Bloomberg, the billionaire former mayor of New York City who had spent hundreds of millions of dollars on ads during a 100-day presidential campaign, announced on Wednesday he's suspending his bid and is endorsing former Vice President Joe Biden.

"Three months ago, I entered the race for President to defeat Donald Trump," Bloomberg said in a statement. "Today, I am leaving the race for the same reason: to defeat Donald Trump — because it is clear to me that staying in would make achieving that goal more difficult."

Elizabeth Warren is "talking to her team to assess the path forward," an aide told NPR on Wednesday morning. A big question now hangs over her campaign after falling short on Super Tuesday: What now?

The Democrats debated for the 10th time Tuesday night and it was a bit of a mess. There was shouting. There was overtalk. There were lots of attacks.

So what to make of that muddle? Here are four takeaways that emerged as the dust settled.

1. Joe Biden was focused on the win in South Carolina

South Carolina is a must-win for the former vice president after disappointing finishes in Iowa, New Hampshire and Nevada. He came into the debate with a game plan and executed it the best he could.

Days before the South Carolina primary, seven Democratic candidates will face off in a debate in Charleston, S.C.

The debate comes after Sen. Bernie Sanders handily won the Nevada caucuses, won in New Hampshire and tied in Iowa.

Here's what you need to know:

When is the South Carolina Democratic debate? Tuesday, from 8 to 10 p.m. ET.

Where is the debate being held? Charleston.

What channel is the debate on? CBS and streaming online on CBSN.

The 2020 Democratic nomination is now Sen. Bernie Sanders' to lose.

The independent from Vermont ⁠— who is running as a Democrat and often speaks about the ills not just of Republicans, but also of Democrats ⁠— handily won the Nevada Democratic caucuses.

In Las Vegas — a city known for prize fights — the Democrats were gloves off.

And a new entrant in the ring took a lot of incoming: former New York City Mayor Michael Bloomberg, who has spent more than $300 million of his own money on ads to raise his profile.

Vermont Sen. Bernie Sanders is rising in the polls among Democrats, but questions about his electability against President Trump persist because he self-identifies as a democratic socialist.

A new NPR/PBS NewsHour/Marist poll backs up the idea that the label could hurt him.

Updated at 7:08 a.m. ET

Vermont Sen. Bernie Sanders has opened up a double-digit lead in the Democratic nominating contest, according to a new NPR/PBS NewsHour/Marist poll.

Sanders has 31% support nationally, up 9 points since December, the last time the poll asked about Democratic voters' preferences.

Updated at 10:20 a.m ET

Vermont Sen. Bernie Sanders pulled off a narrow victory in New Hampshire on Tuesday night, providing a jolt of energy to his front-of-the-pack status by holding off Pete Buttigieg, former mayor of South Bend, Ind.