Cleon
King of the Pod People
It means that Hillary started and supports media matters
Media Matters was started by David Brock, not Hillary Clinton.
and it in turn strongly supports her and her campaign.
In fact, the guy that runs media matters gave dozens of interviews when the Hillary Clinton email sever scandal came out.
Basically mm is Hillary's unofficial propaganda/attack site.
They certainly have a Democratic bias, and they defend Clinton against Republican attacks - as they do for all Democrats, as far as I can tell.
I'm underwhelmed by the evidence for your claim.
And if you try to imply for a second that I'm a Hillary supporter, you get the laughing dog.