Who's Lying? John McCain or Andrea Mitchell?

From DKos:

From John McCain's appearance last night on Larry King Live, when asked about Barack Obama's canceled visit to Landstuhl:

KING: Why do you think he didn't go?

MCCAIN: I have no idea except that I know that according to reports that he wanted to bring media people and cameras and his campaign staffers...

That's not spin, that's a blatant, outright lie, and John McCain knows it's a lie. Here is what Andrea Mitchell had to say about the claim that Obama planned to bring cameras and the press:

That literally is not true...Now the point is, Obama had no intention of bringing any cameras with him. I was there, I can vouch for that...he wasn't planning to bring an entourage...

So there you have it. John McCain outright lied in his new ad, and he's outright lying in continuing to promote the message of that ad. After Andrea Mitchell weighed in and said that she was there, there isn't any wiggle room anymore. The ad is a lie, McCain is lying. When do McCain's friends in the media plan on calling him out on this. Why has he decided to go so negative? Is he that desperate? Has he given up any notion of being a maverick? Why would John McCain outright lie and then continue to spread the lie? A real media would ask these questions, and they'd certainly be asking them if Barack Obama were the candidate to enter the gutter like McCain has.