The poll found that 61% of self-identified Republicans said they would vote for the former US president in the state-by-state nominating contest to pick a challenger to Democratic President Joe Biden.

None of his rivals were anywhere close. Florida Governor Ron DeSantis and former South Carolina Governor Nikki Haley were each backed by 11% of self-identified Republicans.

The first ballots of the 2024 US elections will be cast in Iowa's Republican caucus on January 15.