SELMA, Ala. — Pete Buttigieg, the former small-city Indiana mayor and first openly gay major presidential candidate, has decided to quit the Democratic race, a person briefed on Mr. Buttigieg’s plans said on Sunday, following a crushing loss in the South Carolina primary where his poor performance with black Democrats signaled an inability to build a broad coalition of voters.
Mr. Buttigieg canceled plans for a Sunday night rally in Dallas and a Monday morning fund-raiser in Austin to return to South Bend to make a speech. “So a little bit of news for you about our flight,” he said. “We’re making a change in our travel plans and traveling to South Bend rather than to Texas. We’re going to be making an announcement there about the future of the campaign and we are looking forward to sharing with our supporters and with the country where we’re going from here. That is why you will find we are heading in a different direction.”
An aide said Mr. Buttigieg would announce the suspension of his campaign. During a call with the campaign staff minutes earlier, a Buttigieg official said the candidate “doesn’t want to move on” to Super Tuesday and beyond.
Mr. Buttigieg, 38, narrowly won the Iowa caucuses early last month and came in a strong second place in the New Hampshire primary, exciting liberal white Democrats with his cool, hyper-articulate manner. But he never broadened his breadth of support in a party with a large component of nonwhite voters, and one that has veered leftward since 2018.
After raising more than $76 million in 2019, an astonishing haul for a mayor with no national profile, Mr. Buttigieg spent nearly all his treasure in Iowa and New Hampshire. He faced campaigning across the coast-to-coast states of Super Tuesday with evaporating funds and little chance of clearing the threshold of 15 percent of votes needed to amass delegates.
In the last presidential debate, on Tuesday in South Carolina, Mr. Buttigieg forcefully warned that nominating Senator Bernie Sanders of Vermont, the front-runner, would lead to crushing defeat in the fall, not just “four more years of Donald Trump,” but the loss of the Democratic House majority secured by moderate candidates who won in suburban swing districts in 2018.
But Mr. Buttigieg’s own existential crisis was his inability to appeal to voters of color, both African Americans and Latinos.
Many establishment Democratic officials have openly worried about the party’s moderate candidates cannibalizing the center-left vote and making it impossible to coalesce and challenge Mr. Sanders.
Mr. Buttigieg on Monday said in a town hall on CNN that he and his fellow moderates had not had any talks about one or more of them dropping out. Asked the same question in a post-debate TV interview on Tuesday, Mr. Buttigieg argued that it was he, as the candidate with the second most delegates, whom other moderates should rally behind.
But except for a polling uptick after his strong Iowa finish, Mr. Buttigieg’s support in an average of national polls plateaued around 10 percent. That imperiled him as the race moved to the 14 Super Tuesday states, including California and Texas, where most delegates to the National Convention go only to candidates who win 15 percent in congressional districts and statewide.
As Mr. Sanders, in his second presidential run, built a devoted following of progressives with a call for political revolution, Mr. Buttigieg tried to offer an alternative: an upbeat message of unity and more ideological flexibility, aimed at attracting moderate Democrats, independents and crossover Republicans. But the pitch, which some found contained more platitudes than passion, was no match at a time of rising anger on the left that the political establishment has failed to address health care, income inequality and climate change.
In his quest to earn black support, Mr. Buttigieg spent more time visiting South Carolina than any other candidate, spent more on TV ads in the state than any candidates besides the billionaire Tom Steyer, and rolled out a sweeping proposal, called the Douglass Plan, to redress the legacy of racism. None of it made much of a dent with African-American voters who had developed a deep trust in Mr. Biden over decades.
Another factor may have been the sometimes troubled history of Mr. Buttigieg’s relationship with black residents of South Bend, including his demotion of a black police chief and the shooting last summer of a black resident by a white officer. Mr. Buttigieg tried to counter poor impressions by campaigning with African-American leaders from his hometown who vouched for him.
All along, he believed that winning in Iowa would beget winning in later states with more racially diverse voters.
Despite an early exit from the race, Mr. Buttigieg’s candidacy will be remembered for its remarkably high trajectory: the mayor of Indiana’s fourth-largest city outran, out-raised and outpolled senators and governors who dropped by the wayside.
Reid J. Epstein reported from Selma, Ala., and Trip Gabriel reported from Charlotte, N.C.