The evidence is in the article. He displays emails in their entirety that talk about members of the press colluding on coverage. That's admissible in a court of law.

Here are more emails[0].

It's put up or shut up time. Either you're going to provide a thorough counter of the evidence provided or everybody will know exactly what you are: a liar.

[0]: http://www.breitbart.com/london/2014/09/18/the-emails-that-p...