I remember reading "Breach of Faith" back in about 1974 and it talked about the efforts by Nixon, Agnew and company to preach the notion of the left wing media elite. They were less successful then the crowd today.
And I'll give the rep machine credit for using it well to muffle anything that doesn't fit thier agenda.
It's all part of the game and the Reps are far better infighters then the Dems.
Scream 'Liberal agenda" and anything said is immediately nullified.
The Dem effort in return is to point to FOX news etc as the Rep agenda mouth piece.
It does imply that folks are too dumb to think for themselves however which is too bad.
We'll tell you where to read, what to watch and where the 'truth' is, as long as it fits our agenda.
The problem is, I don't believe either side gives a damn about most of us. They see it as a game of manipulating opinion for their own ends, not the welfare of the people they are supposed to represent.
Ed Murrow in his 1958 speech in Chicago had it right when he expressed his concerns about marketing, ratings, money dictating the news, not the story itself.