The Run-up

Finally. More than a year after Donald Trump first announced his 2024 presidential run, six months after Gov. Ron DeSantis of Florida refocused his campaign strategy to be all-in on Iowa, and right in the midst of debilitating winter weather, the Iowa caucuses are upon us.And “The Run-Up” has everything you need to know to understand what might happen today — and what it will mean for the race going forward.What’s at stake is clear: Anyone who is going to slow Mr. Trump on his path to clinching the nomination has to get started in Iowa, with at least a close second-place finish. Going into the caucus, Mr. Trump has a dominant polling lead. But now it’s up to the voters.Iowa voters tend to care more about candidates who can speak more to small-town and religious values. The state’s evangelical leaders have largely backed Mr. DeSantis, but evangelical voters themselves — including people coming out to Trump events in freezing temperatures in the last week — have largely backed Mr. Trump.There are three big ques