One issue where Haley stands out is in foreign policy. Her history as Trump's ambassador to the United Nations gives her experience, and her policy positions place her at odds with the frontrunner. The Republican Party has followed Trump's lead in recent year's and become more isolationist. But Haley has taken a more traditional stance and has called for continuing aid to Ukraine, an issue that's becoming less popular with her party's voters. But she also has taken a hard line against China and supports continuing aid for Israel, which the Republican base also supports.

—Monica Potts, 538

Looking at towns where the vote is mostly counted, Trump is overperforming his 2016 benchmarks — but then again, he should be, since in 2016 he won with 35 percent of the vote in a many-candidate field. Trump will hope that the returns look like those in Farmington, where he's currently up 29 percentage points compared to his 2016 margin. But Haley will hope they look more like Newmarket or Conway, where Trump is only up by 15 or 16 percentage points.

— Dan Hopkins, 538 contributor

If voters in New Hampshire are thinking about the general election, Dan, that could be a problem for Trump. Last week, just 52 percent of Iowa caucusgoers voted for Trump. But according to a December YouGov/CBS News poll, likely New Hampshire GOP primary voters view the former president differently than those in Iowa. In that survey, 64 percent of likely voters in Iowa said that Trump would definitely beat Biden in November, while only 51 percent of New Hampshire voters said the same. Voters who said they were considering other candidates also had different reasons in the two states: 70 percent of likely New Hampshire voters who were considering voting against Trump said that one reason, of those provided to them, was that Trump is controversial, while only 57 percent of Iowans considering other candidates said the same. And more New Hampshirites were concerned about Trump's ability to beat Biden than Iowans considering other candidates.

—Mary Radcliffe, 538

Again per the Associated Press via The New York Times, Trump leads Haley 53 percent to 46 percent with 12 percent of the estimated vote counted. That's closer than the polls foresaw, but obviously not good enough for Haley so far.

—Nathaniel Rakich, 538

Haley has been on quite a tear in New Hampshire polls over the last two months. She stands at 36 percent in 538's final New Hampshire polling average, compared to 19 percent on Dec. 1, 2023. Just ahead of the Iowa caucuses, that surge had narrowed Trump's margin in the Granite State to a little over 10 percentage points, much lower than his average margin across the other states.

Since Iowa, however, Trump has also surged in New Hampshire, shooting up to 54 percent percent, his best number of the whole cycle in the state. He is now 18 points ahead of Haley. It's likely Trump gained some votes from Ramaswamy, who was ideologically closest to him and endorsed the former president on stage in Iowa after withdrawing following his poor performance there. It is also possible that Trump will get a last-minute bump from DeSantis's drop out and endorsement on Sunday that is not fully captured by the polls.

Haley hitting, say, 40 percent in New Hampshire would be a feat. Across the polls we've collected, no other candidate even came close to that mark in any state. With such a showing, Haley could, somewhat credibly, claim a moral victory heading into Nevada and South Carolina next month. But, of course, moral victories do not win nominations.

—G. Elliott Morris, 538