Donald Trump's grip on Republican politics is put to the test in ice-cold Iowa's caucuses

Voting is set to begin on Monday night in icy Iowa as former President Donald Trump eyes a victory that would send a resounding message that neither life-threatening cold nor life-changing legal trouble can slow his march toward the Republican Party's 2024 nomination. The Iowa caucuses, which are the opening contest in the months-long Republican presidential primary process, begin at 8 pm EST. Caucus participants will gather inside more than 1,500 schools, churches and community centres to debate their options, in some cases for hours, before casting secret ballots.