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

Coming into today, a big question was whether independents would turn out a high level and put Haley in a competitive position versus Trump. Based on the preliminary exit poll, the answer was yes — but not enough for Haley to win. Overall, 45 percent of voters identified as independent or something else, and they went for Haley by 24 points, 61 percent to 37 percent. However, self-identified Republicans made up 4 percent of the electorate and. broke for Trump by 39 points, 74 percent to 25 percent. Even with a little help from the 6 percent who identified as Democrats (went for Haley 84 percent to 6 percent), Haley couldn't catch Trump because of his overwhelming edge among Republicans.

Another aspect of the independent question is New Hampshire's electoral access rules, which permit those not registered with a party — "undeclared" voters — to vote in party primaries. That group, which includes many self-identified independents, did turn out in a big way, making up 47 percent of the electorate to registered Republicans' 50 percent (same-day registrants made up the rest). And Haley won among undeclared voters 66 percent to 32 percent. But Trump won among registered Republicans 74 percent to 24 percent. These numbers will change somewhat after further weighting based on the results, but the big takeaway is that independents put Haley in range, but Trump's dominance among Republicans preserved his edge.

—Geoffrey Skelley, 538