Republican contest to take place on what is expected to be coldest of any caucus day in history
Donald Trump, the former US president, has admitted to a “worry” about severe winter weather hurting his support in Monday’s Iowa caucuses, the first contest to decide a Republican nominee for the White House.
Trump remains the overwhelming favourite. On Saturday he held a near 30-point lead over Nikki Haley in an NBC News/ Des Moines Register/ Mediacom Iowa poll, seen as the gold standard, with Ron DeSantis trailing in third and Vivek Ramaswamy in fourth.