Former Vice President Joe Biden has won South Carolina's Democratic primary, CNN projects, establishing himself as the main moderate rival to US Sen. Bernie Sanders.

Biden bet everything on South Carolina after anemic performances in the first three nominating states, and now he heads into Super Tuesday with momentum.

"Just days ago, the press and pundits had declared this candidacy dead," Biden said in a speech to his supporters. "Because of you, the heart of the Democratic Party, we just won and we won big because of you. We are very much alive."

Supporters cheer for Biden in Columbia.
Supporters cheer for Biden in Columbia.
Jim Watson/AFP/Getty Images
As results were still coming in, billionaire businessman Tom Steyer announced Saturday that he was <a href="index.php?page=&url=https%3A%2F%2Fwww.cnn.com%2F2020%2F02%2F29%2Fpolitics%2Ftom-steyer-drops-out-2020-race%2Findex.html" target="_blank">dropping out of the race.</a> "I said if I didn't see a path to winning that I'd suspend my campaign," he said. "And honestly, I can't see a path where I can win the presidency."
As results were still coming in, billionaire businessman Tom Steyer announced Saturday that he was dropping out of the race. "I said if I didn't see a path to winning that I'd suspend my campaign," he said. "And honestly, I can't see a path where I can win the presidency."
MARK MAKELA/X02566/REUTERS
Pete Buttigieg, the former mayor of South Bend, Indiana, hugs his husband, Chasten, at a rally in Raleigh, North Carolina, on Saturday night.
Pete Buttigieg, the former mayor of South Bend, Indiana, hugs his husband, Chasten, at a rally in Raleigh, North Carolina, on Saturday night.
Win McNamee/Getty Images
US Sen. Bernie Sanders <a href="index.php?page=&url=https%3A%2F%2Fwww.cnn.com%2Fpolitics%2Flive-news%2Fsouth-carolina-primary-results-2020%2Fh_b84fd99463fad76704b36aa1bdd70926" target="_blank">congratulated Biden</a> at a rally in Virginia Beach, Virginia. "We did not win in South Carolina. That will not be the only defeat. There are a lot of states in this country and nobody can win them all," Sanders said.
US Sen. Bernie Sanders congratulated Biden at a rally in Virginia Beach, Virginia. "We did not win in South Carolina. That will not be the only defeat. There are a lot of states in this country and nobody can win them all," Sanders said.
Eric Baradat/AFP/Getty Images
Voters fill out their ballots at a polling place in Charleston.
Voters fill out their ballots at a polling place in Charleston.
Patrick Semansky/AP
A voter casts a ballot in Columbia.
A voter casts a ballot in Columbia.
Matt Rourke/AP
Buttigieg speaks in Columbia on Saturday.
Buttigieg speaks in Columbia on Saturday.
Win McNamee/Getty Images
US Sen. Elizabeth Warren greets the crowd during a canvassing kickoff event in Columbia.
US Sen. Elizabeth Warren greets the crowd during a canvassing kickoff event in Columbia.
Sean Rayford/Getty Images
Bernice Scott kisses the cheek of friend Harry Thompson as he arrives to vote in Hopkins.
Bernice Scott kisses the cheek of friend Harry Thompson as he arrives to vote in Hopkins.
Gerald Herbert/AP
Voters arrive to cast their ballots in Fort Mill.
Voters arrive to cast their ballots in Fort Mill.
Lucas Jackson/Reuters
Steyer <a href="index.php?page=&url=https%3A%2F%2Fwww.cnn.com%2Fvideos%2Fentertainment%2F2020%2F02%2F29%2Ftom-steyer-juvenile-dance-video-nr-vpx.cnn" target="_blank">dances with rapper Juvenile</a> singing "Back That Azz Up" during a rally in Columbia on Friday.
Steyer dances with rapper Juvenile singing "Back That Azz Up" during a rally in Columbia on Friday.
Mark Makela/Reuters
Rallygoers listen to Sanders during a campaign event in Columbia on Friday.
Rallygoers listen to Sanders during a campaign event in Columbia on Friday.
Matt Rourke/AP
People take photos of Biden through the windows of Toliver's Mane Event, a barbershop in Columbia.
People take photos of Biden through the windows of Toliver's Mane Event, a barbershop in Columbia.
Elizabeth Frantz/Reuters
Sanders speaks during a campaign event on Friday.
Sanders speaks during a campaign event on Friday.
Matt Rourke/AP
A Buttigieg supporter flaunts buttons during a campaign event in Columbia.
A Buttigieg supporter flaunts buttons during a campaign event in Columbia.
Eric Thayer/Reuters
People take photos as Warren is joined by musician John Legend at a Get Out the Vote event in Charleston on Wednesday.
People take photos as Warren is joined by musician John Legend at a Get Out the Vote event in Charleston on Wednesday.
Brian Snyder/Reuters
US Rep. Jim Clyburn, the House majority whip, listens as Biden speaks in North Charleston on Wednesday. Clyburn endorsed Biden during the event.
US Rep. Jim Clyburn, the House majority whip, listens as Biden speaks in North Charleston on Wednesday. Clyburn endorsed Biden during the event.
Gerald Herbert/AP
Buttigieg campaigns in Rock Hill on Thursday.
Buttigieg campaigns in Rock Hill on Thursday.
Travis Dove/The New York Times/Redux
Warren is reflected in a woman's glasses while speaking in Orangeburg on Wednesday.
Warren is reflected in a woman's glasses while speaking in Orangeburg on Wednesday.
Ruth Fremson/The New York Times/Redux
US Sen. Amy Klobuchar speaks to supporters at a campaign event in Charleston on Wednesday.
US Sen. Amy Klobuchar speaks to supporters at a campaign event in Charleston on Wednesday.
Randall Hill/Reuters
A man arrives at a Sanders campaign event in North Charleston on Wednesday.
A man arrives at a Sanders campaign event in North Charleston on Wednesday.
Patrick Semansky/AP