The Washington Post and the Schar School at George Mason University did an interesting poll of swing state voters to ask about where they got their information and how much they trusted the media. They plotted net trust in the media against net support for Trump and got this scatterplot:
What the scatterplot shows is that there is an almost linear correlation between supporting Trump and not trusting the media. What it can't resolve is whether people who like Trump don't trust the mainstream media because he tells them it is fake news or people who don't trust the media are ill-informed, get their news from Fox and eX-Twitter, and hear how great Trump is from them. It is clear that eX-Twitter and its owner, Elon Musk, were key drivers of misinformation. Only the cause and effect are hard to separate. (V)