The U.S election isn't being held until the fifth of November, but all eyes are on Iowa as the race to be the Republican nominee begins.
Caucus votes - which are cast by registered Republican voters gathered at caucus sites across the state - are the first litmus test for each candidate's viability.
Ron DeSantis, former President Donald Trump and Nikki Haley are the main contenders in the Republican Iowa caucuses. Photo: AFP
But candidates and their campaigns are worried the extremely cold weather will keep voters home, with temperatures dropping as low as minus-18 degrees Celsuis across the state.
To give us some insight into who is standing, and whether anyone can realistically challenge the former President Donald Trump, U.S correspondent Philip Crowther spoke to Ben Strang.
