Tom Steyer

Updated at 10:37 p.m. ET

Joe Biden has run for president three times, and yet until Saturday, he had failed to ever win a primary or caucus.

The 77-year-old former vice president has now notched an expected yet much-needed victory in the South Carolina primary, according to The Associated Press's projection.

Updated at 9:36 p.m. ET

Tom Steyer, the billionaire hedge fund investor and environmental activist who staked his campaign on a strong finish in South Carolina, suspended his presidential campaign on Saturday.

Steyer aggressively courted the black vote in the state, with a focus on racial and economic justice but had a disappointing finish. Former Vice President Joe Biden was projected to win the state.

As Tuesday's Democratic presidential primary debate came to a close, each of the candidates was asked to name the biggest misconception voters have about them.

A day later, the question was still on the mind of Tom Steyer, the billionaire hedge fund investor who has barnstormed South Carolina, aggressively courting the black vote with a focus on racial justice and climate issues.

The candidates in the Democratic presidential primary are competing in South Carolina on Saturday, hoping to win over voters in the fourth contest of 2020. Follow NPR's live coverage of the primary, including results and analysis.

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.

Sen. Bernie Sanders of Vermont is leading the pack in the Democratic presidential primary race as he and six other candidates debate in South Carolina on Tuesday.

The South Carolina primary is on Saturday, with 54 delegates up for grabs. Currently, Sanders has the most delegates, with former South Bend, Ind., Mayor Pete Buttigieg in second, and former Vice President Joe Biden in third.

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.

Updated at 8:48 p.m. ET

Vermont Sen. Bernie Sanders has won the Nevada caucuses, according to an Associated Press projection.

The win gives Sanders victories in two of the first three states to weigh in on the 2020 Democratic presidential nomination. His other win was in New Hampshire, and he also ended in a near-tie atop the still-muddled Iowa caucuses.

The Democratic presidential primary is heading west for the third contest in the 2020 race. Nevada Democrats are hoping their caucuses avoid similar problems that plagued Iowa earlier this month.

Follow NPR's coverage for the latest updates, analysis and results as the caucuses get underway.

Updated at 10:20 a.m. ET

The finish at the top in New Hampshire looked a lot like the finish last week in Iowa, this time with Vermont Sen. Bernie Sanders leading the way and former South Bend, Ind., Mayor Pete Buttigieg finishing a close second.

But from the No. 3 spot on down there were some pretty big surprises, including the rise of Minnesota Sen. Amy Klobuchar and disappointing finishes for Massachusetts Sen. Elizabeth Warren and former Vice President Joe Biden.

Here are six takeaways from what happened last night:

Pages