COLUMBIA, S.C. (AP) — President Joe Biden has won South Carolina’s Democratic primary, notching an overwhelming 2024 victory in the state that vaulted him to the White House four years ago.

Biden on Saturday defeated the other longshot Democrats on South Carolina’s ballot, including Minnesota Rep. Dean Phillips and author Marianne Williamson.

The president’s campaign had invested heavily in driving up turnout for Biden, aiming to test-drive efforts to mobilize Black voters, who are a key part of the Democratic vote in South Carolina and central to Biden’s strategy for victory in November.

THIS IS A BREAKING NEWS UPDATE. AP’s earlier story follows below.

COLUMBIA, S.C. (AP) — President Joe Biden is looking for an easy victory Saturday in South Carolina’s Democratic primary that officially kicks off his party’s nominating process, validating a new lineup he championed to better empower Black voters who helped revive his 2020 campaign.

Biden is overwhelmingly favored against Minnesota Rep. Dean Phillips and self-help author Marianne Williamson. Yet the long and sometimes contentious process that saw the Democratic National Committee officially replace Iowa with South Carolina in its presidential primary’s leadoff spot has made what’s unfolding noteworthy.

The GOP’s South Carolina primary is Feb. 24.

Arguing that voters of color should play a larger role in determining the Democratic presidential nominee, Biden championed a calendar beginning in South Carolina. The state is reliably Republican, but 26% of its residents are Black.

In the 2020 general election, Black voters made up 11% of the national electorate, and 9 in 10 of them supported Biden, according to AP VoteCast, an expansive survey of that election’s voters.

Biden was in Delaware — not South Carolina — on Saturday before leaving for a trip to California and Nevada. He attended an open house at his campaign headquarters in Wilmington, telling supporters, “I’m feeling good about where we are.” The president said voters around the country are beginning to focus on the election and “the polling data is picking up across the board.”

“We cannot, we cannot, we cannot lose this campaign, for the good of the country,” Biden said before leaving on a weekend trip. He appeared with first lady Jill Biden, Vice President Kamala Harris and her husband, second gentleman Doug Emhoff.

Biden also called into four Black radio stations to talk up the importance of South Carolina’s primary, telling WJMZ Radio in Greenville, “We have a large African American population in America, they deserve to have a say – particularly in the Democratic Party – a say in who the nominee should be.”

Earlier in the day, in South Carolina’s capital of Columbia, Democratic National Committee Chairman Jaime Harrison said, “We all know that we, because of the color of this, we, our great grandparents, our grandparents, could not always vote here.” A South Carolina native who is Black, Harrison pointed to his own skin.

“For this president to say, ‘Jaime, for the entirety of your life, we have started this process in Iowa and New Hampshire, and now, we’re going to start it in South Carolina’ — no other president before ever decided to touch that issue,” Harrison added. “But Joe Biden did, and I will always be grateful to the president for giving us a chance, for seeing us, and understanding how much we matter.”

Biden pushed for South Carolina to go first followed three days later by Nevada. The new calendar also moves the Democratic primary of Michigan, a large and diverse swing state, to Feb. 27, before the expansive field of states voting on March 5, known as Super Tuesday.

South Carolina was also where Biden reversed his fortunes with a resounding victory during the 2020 Democratic primary after defeats in Iowa, New Hampshire and Nevada.

Many Black Democrats in South Carolina are still loyal to Biden after he was vice president to the nation’s first Black president, Barack Obama. The state’s senior member of the U.S. House, Democrat Jim Clyburn, long one of Congress’ most powerful Black leaders, remains a close Biden friend and ally.

The DNC sponsored a six-figure ad campaign across the state and Nevada to boost enthusiasm for the president among Black and Latino voters. Nevada’s population is 30% Latino.

Black voters interviewed during the recent early voting period listed a range of reasons for supporting Biden, from his administration’s defense of abortion rights to appointing Black jurists and other minorities to the federal courts. Some echoed Biden’s warnings that former President Donald Trump, the heavy front-runner for the Republican nomination, would threaten democracy as he continues to push lies that the 2020 vote was stolen.

“We can’t live with a leader that will make this into a dictatorship. We can’t live in a place that is not a democracy. That will be a fall for America,” said LaJoia Broughton, a 42-year-old small business owner in Columbia. “So my vote is with Biden. It has been with Biden and will continue to be with Biden.”

Some voters said they were concerned about the 81-year-old Biden’s age, as many Americans have said they are in public polling. Trump is 77. Both men have had a series of public flubs that have fueled skepticism about their readiness.

“They’re as old as I am and to have these two guys be the only choices, that’s kind of difficult,” said Charles Trower, a 77-year-old from Blythewood, South Carolina. “But I would much rather have President Biden than even consider the other guy.”

New Hampshire held a primary last week that defied the new calendar and wasn’t sanctioned by the DNC. Still, Biden won the state via write-in and a big South Carolina victory could begin to allay the concerns of a majority of voters, as even most Democrats don’t want him seeking a second term.

In the meantime, the Democratic establishment — and even potential presidential hopefuls who could have competed against the president from the left or middle — have lined up behind Biden. The DNC also isn’t planning primary debates, while Phillips has challenged his name not appearing on primary ballots in Florida and North Carolina.

The president’s reelection campaign says it’s already focusing on November’s general election. Trump has in turn accused Biden of threatening democracy, while downplaying his role in promoting falsehoods about election fraud embraced by the rioters who stormed the Capitol on Jan. 6, 2021.

Biden’s campaign, the DNC and its other fundraising arms announced raising $97-plus million in the final three months of last year and entered 2024 with $117.4 million in cash on hand. Trump amassed about $130 million in 2023’s final quarter and had $42-plus million to start the election year.

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Weissert reported from Washington. Associated Press writers Seung Min Kim in Wilmington, Delaware, and Ayanna Alexander contributed to this report.