By Nathan Layne and Tim Reid URBANDALE/DES MOINES, Iowa (Reuters) – Even Jesus could lend a hand when Iowans face frigid weather conditions to pick their Republican presidential nominee on Monday, set to be a record cold caucus night with temperatures as low as -20 degrees Fahrenheit (-29 degrees Celsius). “I’m declaring that it be warmer in Jesus’ name,” evangelist Patricia Lage told Reuters at an event on Thursday featuring former President Donald Trump’s eldest son Don Jr. in Urbandale, on the outskirts of the state capital city Des Moines. But Lage, who backs Trump’s bid for another term i…