The previous Des Moines Register poll had Cruz up 3%. That’s an 8% swing in favor of Trump. The Huffington Pollster’s weighted average of recent polls now has Trump at an 8% lead in Iowa.
Cruz’s ground game and voter imitation mailer is going to have to be very very very strong to overcome Trump’s lead.
I think Cruz’s debate performance hurt him. And Megyn’s ambush.
Close to the end all of the polls start getting more truthful. They want to be accurate.