Former President Donald Trump easily won New Hampshire's primary on Tuesday, seizing command of the race for the Republican nomination and making a November rematch against President Joe Biden feel all the more inevitable.

The result was a setback for former UN Ambassador Nikki Haley, who finished second despite investing significant time and financial resources in a state famous for its independent streak. She's the last major challenger after Florida Gov. Ron DeSantis ended his presidential bid over the weekend, allowing her to campaign as the sole alternative to Trump.

Trump’s allies ramped up pressure on Haley to leave the race before the polls had closed, but Haley vowed after the results were announced to continue her campaign. Speaking to supporters, she intensified her criticism of the former president, questioning his mental acuity and pitching herself as a unifying candidate who would usher in generational change.

“This race is far from over. There are dozens of states left to go,” Haley said, while some in the crowd cried, “It’s not over!”

Trump, meanwhile, can now boast of being the first Republican presidential candidate to win open races in Iowa and New Hampshire since both states began leading the election calendar in 1976, a striking sign of how rapidly Republicans have rallied around him to make him their nominee for the third consecutive time.

At his victory party Tuesday night, Trump repeatedly insulted Haley and gave a far angrier speech than after his Iowa victory, when his message was one of Republican unity.

“Let's not have someone take a victory when she had a very bad night,” Trump said. He added, “Just a little note to Nikki: She’s not going to win.”

With easy wins in both early states, Trump is demonstrating an ability to unite the Republican Party’s factions firmly behind him. He’s garnered support from the evangelical conservatives who are influential in Iowa and New Hampshire’s more moderate voters, strength he hopes to replicate during the general election.

Trump posted especially strong results in the state's most conservative areas, while Haley won more liberal parts. The only areas in which Haley was leading Trump were in Democratic-leaning cities and towns such as Concord, Keene and Portsmouth.

Pat Sheridan, a 63-year-old engineer from Hampton, voted for Trump “because he did a really good job the first time.”

“We need a businessman, not bureaucrats,” Sheridan said.

About half of Republican Party primary voters said they are very or somewhat concerned that Trump is too extreme to win the general election, according to AP VoteCast, a survey of the state’s electorate. Only about one-third say the same about Haley.

Still, Haley's path to becoming the Republican Party standard-bearer is narrowing quickly. She won’t compete in a contest that awards delegates until South Carolina’s Feb. 24 primary, bypassing the Feb. 8 Nevada caucuses that are widely seen as favoring Trump.

As South Carolina's former governor, Haley is hoping a strong showing there could propel her into the March 5 Super Tuesday contests. But in a deeply conservative state where Trump is exceedingly popular, those ambitions may be tough to realize and a home-state loss could prove politically devastating.

“This is just the beginning; we’ve got the rest of the nation,” said Sandy Adams, 66, an independent from Bow who supported Haley. “I think we’ve got a strong candidate, and the first time we have just two candidates, and that’s a great thing.”

On the Democratic side, Biden won his party's primary but had to do so via a write-in effort. The Democratic National Committee voted to start its primary next month in South Carolina, but New Hampshire pushed ahead with its own contest. Biden didn't campaign or appear on the ballot but topped a series of little-known challengers.

Trump's early sweep through the Republican primary is remarkable considering he faces 91 criminal charges related to everything from seeking to overturn the 2020 presidential election to mishandling classified documents and arranging payoffs to a porn actress. He left the White House in 2021 in the grim aftermath of an insurrection at the US Capitol led by his supporters who sought to stop the certification of Biden’s win. And Trump was the first president to be impeached twice.

Beyond the political vulnerabilities associated with the criminal cases, Trump faces a logistical challenge in balancing trials and campaigning. He has frequently appeared voluntarily at a New York courtroom where a jury is considering whether he should pay additional damages to a columnist who last year won a $5 million jury award against Trump for sex abuse and defamation. He has turned these appearances into campaign events, holding televised news conferences that give him an opportunity to spread his message to a large audience.

But Trump has turned those vulnerabilities into an advantage among Republican Party voters. He has argued that the criminal prosecutions reflect a politicized Justice Department, though there’s no evidence that officials there were pressured by Biden or anyone else in the White House to file charges. (AP)