Fox broadcast stations having nightly news, like your local Fox affiliate news at 11 was and remains different.
Spoken by someone who clearly has not read the Powell Memorandum. Reagan was just following the playbook. It's all right there, out in the open. It goes like clockwork because the real backer for both sides -- mega-corporatism -- wants it. The "culture war" conflicts are considered unimportant, as they have no effect at all on the substance.
Trump is the first on his side to step out of line. It will cost them, but maybe not much. The goal now will be to get people distracted again, so the real work of eliminating people's influence may proceed.
Reagan himself was an FBI informant and was involved with blacklisting so-called Communists way back when he was President of the Screen Actors Guild, during the McCarthy era. So any story that says "It all started on such and such a date" is completely arbitrary.
You can talk about Barry Goldwater. The National Review. Jerry Falwell and Pat Robertson. There was already a strong conservative movement growing that got Reagan elected in the first place. Not to mention the October surprise conspiracy theory of his 1980 election.
The 1960s, the Vietnam War, the civil rights era, these had a huge impact socially, started political realignments, and caused much internal turmoil in the United States.
The Gingrich "Republican Revolution" occurred in 1994. Hillary Clinton claimed there was a vast right-wing conspiracy in 1995. Government shutdowns. Impeachment. Oklahoma City bombing. All of this occurred before Fox News even went on the air.
Will anyone acknowledge that Timothy McVeigh and Terry Nichols were radicalized before Fox News existed, not to mention before Twitter, Facebook, and YouTube?
https://www.britannica.com/topic/Fairness-Doctrine might be useful.