The Internet has collected evidence of bias among individual debate moderators, their moderation strategies and departures from simple moderation into being anti/pro actors, and has now even counted their "mute button" hits and duration.
The Internet has also been adding up all the hours minutes and seconds each news channel is spending on the corruption topic. One Media Giant did its version of that here... https://www.nytimes.com/2020/10/23/technology/fox-news-hunter-biden.html and also noted... “In 2016, the WikiLeaks releases were a gigantic story, covered across the political spectrum,” said Emerson Brooking, a resident fellow at the Digital Forensic Research Lab, who worked on the report. “In 2020, the Hunter Biden leaks are a WikiLeaks-sized event crammed into one angry, intensely partisan corner” of cable news television. Many media doing their own "fact checking", each often biased in that task one way or another... https://www.nytimes.com/live/2020/2020-election-misinformation-distortions Biases tied from existance of such oppressively sized governments and political parties in giant feedback loop.