I think Fox erred in allowing political opinion and hard news programming to co-mingle, yet the network has thrived. But it may have reached the limit of growth with that model, and in order to attract new viewers, programs like Hannity will have to go. O’Reilly, Greta, and Kelly give the impression of objectivity and allow their guests to provide arguments on both sides of controversial stories. That is the approach with greatest appeal to independent thinkers and voters.
If someone wants to start up a right-wing channel to counter MSNBC, fine. I doubt it will be financially viable, but it’s still (partially) a free country. I wouldn’t watch it much because I have a brain and can assimilate diverse information to form my own opinions; the last thing I want is an echo-chamber on either side.
You can start a conservative channel but no cable system or satellite channel is likely to carry it and no big advertisers will be caught dead running ads on it and it will be attacked mercilessly in the rest of the media.