I'm taking the unusual step here of dealing with a two-week old piece of work, but I'm doing it because the topic is somewhat evergreen and the issues it presents remain very much at the forefront of our national discourse. You will recall that it only took a few days after the election of Donald Trump for the mainstream media to suddenly start carping about "fake news."
The implication was that Trump won in part because gullible people posted false news stories from unreputable web sites that made all kinds of crazy claims about Hillary or other things. One claimed the pope had endorsed Trump. Another claimed Hillary had some deadly disease. I remember one that claimed to have quotes from Hillary's actual doctor, on the record, exposing some sort of scandalous health issue.