Donald Trump has won the Republican party’s Iowa caucuses, according to a projection by Sky’s US partner NBC News.

The voting is the first step of a process that’s likely to see the former president picked as Republican candidate for November’s election.

Mr Trump was overwhelming favourite to be top pick among Republican members in Iowa and all eyes are now on his margin of victory and who will come second.

Florida governor Ron DeSantis and former UN ambassador Nikki Haley are the main candidates hoping to pull in a respectable result and position themselves as an outside challenger to Mr Trump.

Voting among Republican party members began at 7pm local time and is taking place in hundreds of schools, community centres and other venues across Iowa.

Mr Trump had urged supporters to brave temperatures colder than -20C to register their vote, joking “even if you vote and then pass away, it’s worth it”.

This breaking news story is being updated and more details will be published shortly.

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