The model for the news is:
Ads first, news second.
Just as print magazines did many years ago, the news shows started to target specific audiences.
It’s all about keeping your base going, so you can sell your ad space at a premium. News is just part of the product.
Truly fair and balanced news doesn’t work, because people love to indoctrinate themselves. They want to watch/listen/read the familiar and that which comforts them. So, for instance, radicals–left or right–choose media that goes along those lines.
Just remember, all news sources play to their audiences.