Politics is a full-contact sport, but it's not OK to hit below the belt. Ben Carson, Donald Trump and Marco Rubio spent last week blaming frontrunner Sen. Ted Cruz for a problem that originated from Team Carson's own disorganization—even after media records and Iowa exit poll data cleared Cruz. Before you vote in your primary, you deserve the truth. "You don't have to be a politician to tell the truth," Carson quipped in a recent debate. No, you don't. So let's start telling the truth. Unless you’re now a politician. Carson finished 4th in the February 1 Iowa caucus. Cruz...