re: When did "the news" flip to propaganda?

No sir, the MSM was NEVER unbiased, at least not in my 61 year lifetime. When Reagan ran in 1980 the media hated him. They insinuated that he was stupid, said he was going to start a nuclear war; and assured us that his economic policies would ruin us. No, the left controls the media, and they always have.

They stopped pretending to be unbiased when the internet opened up audiences to many other sources. At that point consumers of news started gravitating to the most partisan sources that supported “their side”.