CHRIS HAYES (HOST): The problem, though, is if you cannot predict what he actually stands for day-to-day, how do you run a campaign that's against him in any substantive sense? 

ERIC BOEHLERT: Well look, some of this is going to have to do with the press, right? That's what Media Matters does. I mean poor Al Gore was tagged as a liar for nine months because the press found some anecdotal evidence that he exaggerated. This should be the clarion call of the portrait of Donald Trump. I mean he is a serial liar. That should be the center, really, of the press portrait. Instead, we get he's authentic, he's a straight shooter and things like that. So I think the Clinton campaign will have to do what it has to do, but some of the responsibility is on the press to tell it like it is. If this guy cannot tell the truth for more than three minutes at a time, that should be a center part of the press coverage. So then the campaign will be through a prism of the press, and it'll be through a prism of these campaigns knocking heads.

Previously:

The View Hosts Fact-Check Trump: “No Matter What The Donald Says, It Has To Be Corrected Right Immediately”

16 Times The Media Let Trump Falsely Claim He Opposed The Iraq War From The Beginning

Tom Brokaw Calls Out Media: Trump “Has Never Been Held Accountable” For His Lies