Republicans vying to beat a dominant Donald Trump to be the party's nominee in the 2024 U.S. presidential election fought for attention in frozen Iowa on Saturday in some of the final campaigning ahead of the first nominating contest on Monday. His rivals will be trying to prevent a rematch between Trump and President Joe Biden for the leadership of the world's most powerful country in what looks set to be a close and deeply acrimonious November vote that has raised questions about the depth of support for Europe and even basic democratic values. Trump, the only current or ex-U.S....