The mainstream news media is composed largely of former and future Democrat political operatives. They are Radio Barack, and the al-Obama Network. They are propagandists for the Progressive Welfare State.
The Republicans have never effectively dealt with this problem, and it is a problem for anyone who cares about truth, and about the free flow of information in a Republic.
Alternatives exist, as we all know, and they are growing. But the GOP remains ever afraid of taking on the media, for fear that they will be denied access, or cast in a poor light - as if they are treated well now.
And of course, the great complicating factor is the schism within the Republican Party itself, between its elite leaders and its conservatives, which allows for easy exploitation by the Democrat media.