I think in the midst of political hysteria, a lot of people forgot a simple fact of life. The mainstream media has and always will function as a platform for lobbying. It is not that they are left leaning by principle alone, but also because the left and democrats specifically lobby money to them.
A lot of this is observable. For example, a lot of times when there is a bombshell story that goes against democrats or the left, you will wonder - why isn’t this all over the news. It’s highly relative, has first hand accounts, etc. That is because nobody is paying CNN or MSNBC to cover those stories.