you're looking live at a donald trump campaign rally in sioux city, iowa. trump is about to speak to supporters there. this is his first time in iowa since multiple polls showed him trailing carson in that state. >> reporter: ben carson's surge is being powered in part by his faith. >> when i pick up my bible, you know what i see? i see the fairest individual in the universe god. >> reporter: his support among evangelical is on the rise leading trump by 40 points. >> you had that flirtation with donald trump and his plain spokenness, i suppose. now we see a settling back to somebody who is more quiet and who seems to be articulating their interests and concerns. >> reporter: carson talks about his faith, but little about his