Iowa is all over for everyone except for Cruz and his Goldman Sachs style morals and ethics.
Cruz supporters can scream all they want that this is all a nothingburger issue, but it's not. This thing has traction with the voters and the press. It's not blowing away. More like blowing up, and Ted had better get a handle on it quick, before it does him real damage.
As it stands now, it's widely perceived that Cruz and his campaign operatives cheated Ben Carson, and to some degree, Trump and Rubio, too.
What they did, looks underhanded and dirty, to a lot of people.