Shortly after quickly being projected the winner, Trump took to the stage and thanked his supporters. He said his victory tonight would be repeated in November, when they'd gather to tell Biden he was fired. Nine months is a long time to wait, he said, and he asked Gov. Henry McMaster, who was on the stage with him, if there was anything he could do to speed it up. "In certain countries, you're allowed to call your election date," he said, and added he would speed it up if he could. Rather than give a long speech himself, though, he shared the stage with McMaster and the states two Senators, Graham and Scott, who both condemned Trump after the Jan. 6 insurrection. Scott was until recently trying to oust Trump as the presumptive nominee, but Trump said he'd done a better job advocating for him than he had for himself. "I'm just very happy he didn’t have that same energy, drive because I probably would have been out of the race a long time ago," Trump said. Scott took to the stage and asked in a country growl, "Is South Carolina Trump country???" fully in campaign mode. The crowd booed Graham, who spoke flatteringly of Trump regardless.

—Monica Potts, 538

Was there any point besides principle in Haley staying in up until tonight? The writing has been on the wall for weeks, and getting trounced in her home state is a humiliation she could have spared herself. This obviously just makes the inevitable even more apparent, but if she didn’t drop out after New Hampshire, what’s a couple more weeks on principle? (Assuming she has enough money to continue campaigning through Super Tuesday, that is.)

—Kaleigh Rogers, 538

To be blunt, there is no practical reason for Haley to stay in the race at this point. She lost New Hampshire and South Carolina, which according to our modeling should be two of her very best states; as a result, she’s probably not going to win a single contest.

It also doesn’t make sense for Haley to stay in just in case the Supreme Court disqualifies Trump from the ballot. If that happens, other candidates like DeSantis will probably just jump back into the race, and they’ll be better aligned with where the Republican Party is these days. In fact, even as we sit here today, I’d honestly give DeSantis better odds than Haley of winning the GOP nomination, even as an inactive candidate.

Basically, there’s only one good reason for Haley to stay in at this point: principle. To give voice to an anti-Trump vision for the Republican Party. To be able to say “I told you so” if Trump loses in the fall. Because she sure isn’t going to be president.

—Nathaniel Rakich, 538

Trump made a comment about how he would hold an election tomorrow if he could. It's true enough that plenty of countries hold elections on a less fixed schedule, but a candidate facing a number of serious charges related to election interference might not want to joke about that. But some of his other remarks, like his joke about how he doesn't mind talking about himself, reminded me of the feel of the 2016 campaign, and his ability to sometimes make voters laugh and feel in on the joke.

—Julia Azari, 538 contributor

Let's not sugar-coat this: If the polls are right, Haley will lose badly to Trump in South Carolina, her home state, tonight. According to 538's average of polls, Trump commands the support of 62 percent of likely primary voters compared with Haley's 34 percent. Haley has gained ground in recent weeks, likely a result of voter consolidation as the rest of the candidates dropped out after voting in Iowa and New Hampshire, but so has Trump.

Moreover, according to a poll released this week by Suffolk University/USA Today (which had a very similar breakdown to our average), Trump is leading Haley with most major demographics in the state. The former president leads among Republicans and conservatives, groups that make up 76 and 81 percent of Republican primary voters in the state, respectively. Haley, meanwhile, holds an almost 20-point lead among respondents who described themselves as moderate or liberal and a 26-point lead among those who say the most important issue is the future of democracy.

According to my colleague Geoffrey Skelley, if Trump wins by as much as the polls imply, it would be the best-ever performance for a non-incumbent presidential candidate in South Carolina primary history. (The current record is George H.W. Bush's 28-point win over Bob Dole in 1988.) Surely the Haley campaign will try to spin a victory out of defeat — Trump is no easy opponent, to be fair — but with these numbers there's simply no denying Trump's strength.

—G. Elliott Morris, 538