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

[Collection]Voting is set to begin on Monday night in icy Iowa as 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. 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.