You'll be surprised to know that there was an actual university backed study on this entitled, "Sharing Knowledge and “Microbubbles”: Epistemic Communities and Insularity in US Political Journalism"

Source: https://journals.sagepub.com/doi/10.1177/2056305120926639

Essentially, all left wing media, personalities, bloggers, websites, celebrities, athletes, professors, etc. are involved in consuming and regurgitating their own refuse and hot excrement to the point where they assume "Twitter World" is the real world (no surprise).

Graph: https://i.maga.host/LRgm8R8.png