Donald Trump said Nikki Haley “has no chance” of winning the 2024 Republican nomination and that his MAGA supporters won’t back her.

The former president, who solidified his standing as the frontrunner in the race after winning the Iowa caucuses Monday night, is stepping up his attacks against Ms Haley ahead of the vote in New Hampshire.

Mr Trump told a New Hampshire town hall last night that Ms Haley was “not going to make it” as she would not be “able to handle the onslaught” a Republican candidate would receive in the presidential election.

“MAGA is not going to be with her,” he said, referring to his slogan, Make America Great Again.

As voting margins narrow, the New Hampshire vote has become a two-person race between former UN ambassador Ms Haley and Mr Trump.

Ahead of the primary on Jan 23, Ms Haley is drawing on support from establishment Republicans, moderates, suburbanites and independents, who are permitted to vote.

Mr Trump meanwhile is relying on far-Right conservatives and working-class voters.

Mr Trump’s attacks came as Ms Haley appeared at a CNN town hall across town, in which she said the country needed a new generation of leaders as she lumped Mr Trump and Joe Biden together.

Ms Haley took aim at their age, telling the crowd that “we don’t need to have our options be two 80-year-olds running for president”.

“We’ve got too many issues,” she said. “You’ve got two people who spent trillions of dollars in debt that our kids are never going to forgive us. Biden and Trump both did that.”

Ms Haley went on to call for term limits on Congress as she called it the “most privileged nursing home in the country”.

Mr Trump’s strategy to knock Ms Haley from the race has seen him court her donors, bash her in television advertisements and use racial-themed dog whistles that mock her Indian heritage.

In a post on Truth Social on Tuesday, Mr Trump referred to Ms Haley as “Nimrada” – a misspelling of her given first name, Nimarata, saying she had given a “whacked out” speech in Iowa, where she came in a distant third this week behind him.

Ms Haley, the daughter of two immigrants from India, was born Nimarata Nikki Randhawa and later took her husband’s surname. She has long used her middle name Nikki.

During a rally in Atkinson, New Hampshire, on Tuesday, Mr Trump said Ms Haley had “artificially boosted her numbers” by appealing to “Democrats and liberals to infiltrate” the GOP primary.

Mr Trump added that he wants to “bring unity” within the Republican Party and that “unity is going to come from success”.

“Success will bring everybody under the same tent,” he said.

A recent CNN poll of the New Hampshire Republican primary showed that Ms Haley had cut Mr Trump’s lead down to the single digits, winning 55 per cent of self-identified moderate voters.

Mr Trump, meanwhile, secured 60 per cent of those who identified as conservative.