A wide range of senior Republicans told POLITICO that if Trump wins Iowa, he'll more than likely be the nominee. One factor they repeatedly pointed to: An Iowa victory over Cruz would validate opinion polls showing him in command of the race. The Trump phenomenon would officially become a reality.
Mike McSherry, a longtime campaign consultant and former executive director of the Republican Governors Association, said: If Trump wins Iowa, I dont know how youd stop him. All these guys are going to be chewing each others throats out for second place.
A top official of a rival GOP campaign, speaking anonymously to avoid offending his candidate, said: If Donald Trump wins Iowa, I think he has wonperiod. Ted Cruz is supposed to win Iowa. If Trump wins, hell be on a trajectory to come out of the SEC primaries [March 1] with close to triple the delegates of anyone else.
One of the nations best-known Republican strategists, speaking on condition of anonymity because of his close connections to the leaders of several of the campaigns, said: Only Trump can stop himself. All his opponents can do is cause him to do things that make him less appealing.