Brutal cold adds another layer to Republicans' final push in Iowa

A pickup truck is driven down a snow-covered road under an Iowa caucuses sign on Friday in downtown Des Moines, Iowa. (Charlie Neibergall/AP)

DES MOINES, Iowa — Ahead of Monday's Iowa caucuses, Republican presidential hopefuls have been traversing the state for months, making their cases as to why they are the best candidate to challenge President Biden.

But in the final days before the caucuses, they also had to make another argument: to convince voters to come out in dangerous temperatures.