Sad but true. And we, the masses, didn't get it then. Last year in high school history class my son was shown a 'year end review' from TV in the early 80's. He came home and told me how biased it was against the Repubs. This was during RR's presidency. I told him that most people believed the news then, it didn't occur to us not to. Really glad to have awakened to the blatant manipulation in favor of the 'progressives'. Wish I had realized it a long time ago.
I don't remember being aware of media bias until Reagan got elected while I was in grad school. I was shocked. Pleased, but shocked, as the media verdict was there was no way he could be elected. Since then the bias has seemed so obvious. Starting to listen to Rush Limbaugh--just hearing someone speak the truth--was another eye-opening event.