The problem that arises when newsrooms are hyper partisan, as is the case with most of the Mainstream Media being composed almost entirely of Democrats, is that

The problem that arises when newsrooms are hyper partisan, as is the case with most of the Mainstream Media being composed almost entirely of Democrats, is that there are no dissenting voices that exist to check the more extreme tendencies of one side. In mainstream newsrooms, the Democrats' perspective is unchallenged, which means that there is no force preventing a lurch towards extremism. It's similar to a nation with One Party Rule. There are no checks and balances so extremism settles in.