I've been keeping an eye on Wolfeboro, New Hampshire, where Romney owns a summer home. But so far, the community that gave Trump 30 percent of the vote in 2016 has yet to weigh in.

—Dan Hopkins, 538 contributor

Trump's victory speech tonight struck me by how angry it was, especially after his attempt to be a little more conciliatory following Iowa. He wouldn't even mention Haley by name, calling her an imposter instead. He suggested her ally Sununu was on drugs, and brought on Ramaswamy to launch more invectives in her direction. If you're Haley, and you relish getting under Trump's skin in a way that few other candidates have managed so far, why are you going to drop out? Haley is wily and has delighted in running against those who have dismissed her for as long as she's been in politics, so I imagine speeches like Trump's tonight only fuel her.

—Jacob Rubashkin, Inside Elections

Trump gave Ramaswamy 60 seconds on the mic, who used his time to suggest that Haley staying in the race is the "ugly underbelly of American politics." In political science we call that "exit talk," and according to research, women who run for the presidency have been subject to more "exit talk" than men.

—Meredith Conroy, 538 contributor

In a rambling speech with his former challengers Sen. Tim Scott and Vivek Ramaswamy behind him, Trump criticized Haley for giving what he called a victory speech. "She failed badly," he said. He also had words for Gov. Chris Sununu, who'd endorsed her. He said that he would beat Biden and also claimed again, falsely, that he won in 2020. Ramaswamy took over the mic to praise Trump before Trump transitioned to immigration, repeating many of his false claims about open borders. In all, he was ready to dismiss Haley and pivot to the general election.

—Monica Potts, 538

It's been only eight days since Iowa's first-in-the-nation caucuses last Monday, but a lot has happened since then. On the night of the caucuses, businessman Vivek Ramaswamy dropped out of the race and endorsed former President Donald Trump, and Florida Gov. Ron DeSantis followed suit on Sunday. With former Arkansas Gov. Asa Hutchinson also leaving the race last week, former U.N. Ambassador Nikki Haley is Trump's last major competitor standing.

And everyone has their eyes on New Hampshire as potentially the only state where Trump has a realistic chance of losing. Haley has invested heavily in New Hampshire and has been suggesting since early December that today's race would be the start of a competitive two-person primary between her and Trump. She's got her two-person race, but whether it will be remotely competitive remains to be seen. Trump has only continued to consolidate party support since his Iowa victory, and anything less than a convincing win for him would be surprising.

So when might we know? First polls will close tonight at 7 p.m. Eastern, and last polls will close at 8 p.m., which is the earliest time we could have a race projection. But as we did last week (when Trump's victory was projected only 30 minutes after caucuses had begun), we will of course be sticking around no matter what happens to see how each candidate does across the state and discuss what it could mean for the rest of 2024.

And that's not all! Granite State Democrats also have a primary today, and it's a weird one — New Hampshire is violating Democratic primary calendar rules by holding it so early. As a result, President Joe Biden isn't campaigning or even on the ballot, but his competitors, Rep. Dean Phillips and self-help author Marianne Williamson, are. While Biden isn't expected to face serious competition for the actual nomination, his margin of victory today as a write-in candidate could be one early sign of Democrats' grassroots enthusiasm for the incumbent.

Bookmark this page for updates and analysis throughout the night!

—Tia Yang, 538