In Iowa on Saturday, Trump jabbed Walker for Wisconsin’s recent budget troubles. His criticism came after news broke that a top fundraiser for the governor had referred to Trump as “Dumb Dumb” in an email to supporters.
It’s not a good idea to poke at a pit bull.
My guess is the field will attack Cruz at the first debate and leave Donald alone. They have to attack conservatism. Cruz will reciprocate, Trump will just say that is politics and it is time to let a business man get down to business.