Republican rivals battle in frigid Iowa ahead of first test against Donald Trump

Republicans vying for the 2024 US presidential nomination campaigned in Iowa, with Donald Trump leading the polls and his rivals Ron DeSantis and Nikki Haley aiming to place second. The weather may impact voter turnout, but Iowans are used to snow. Trump accused Haley of being a "globalist" and DeSantis's polls have slid.