Trump makes "Four-Pinocchio" statements over and over again, even though fact checkers have demonstrated them to be false. He appears to care little about the facts; his staff does not even bother to respond to fact-checking inquiries.

But, astonishingly, television hosts rarely challenge Trump when he makes a claim that already has been found to be false. For instance, Trump says he was against the 2003 invasion of Iraq, but research by BuzzFeed found that he did express support for an attack. He said the White House even sent a delegation to tell him to tone down his statements —and we found that also to be false.

The online version of the Fact Checker keeps a running list of Trump’s Four-Pinocchio statements. He now has 26, which accounts for nearly 70 percent of Trump’s statements that have been fact checked.

Hopefully, as the election cycle progresses, interviewers will start to hold his feet to the fire. Even if they don't, you can bet Clinton will, come the debates.