Haley’s Loss to Trump in South Carolina Fuels More Doubts About Her Viability

Former President Donald J. Trump easily defeated Nikki Haley in South Carolina’s Republican primary on Saturday, delivering a crushing blow in her home state and casting grave doubt on her long-term viability.

Mr. Trump’s victory, called by The Associated Press, was widely expected, and offers fresh fodder for his contention that the race is effectively over. Ms. Haley pledged to continue her campaign, but the former president has swept the early states and is barreling toward the nomination even as a majority of delegates have yet to be awarded.

“This was a little sooner than we anticipated,” he said in Columbia, S.C., minutes after the race was called, adding that he had “never seen the Republican Party so unified as it is right now.”

Throughout his victory speech, Mr. Trump made it clear that he was eager to turn his attention to the general election, at one point telling the crowd: “I just wish we could do it quicker. Nine months is a long time.”

He also did not mention Ms. Haley by name, alluding to her only twice: once to knock her for a disappointing finish in a Nevada primary contest with no practical value, and once for supporting an opponent of his in 2016.

In her election-night speech in Charleston, S.C., Ms. Haley congratulated Mr. Trump on his victory. But she said the results — which showed her with about 40 percent of the vote when she spoke around 8:30 p.m. — demonstrated that “huge numbers of voters” were “saying they want an alternative.”