For what it's worth, while I don't agree with the moron bit of what OP said, I have felt like I have seen HN leaning more pro-Trump. And it does also feel like saying anything critical of him can be heavily downvoted. There really does appear to be a large contingent of pro-Trump people on here, at least in my experience. I don't have citations, just my own experience, so, obviously take it for what it is.

Pay attention to usernames. There are some pro-Trump, pro-Russia people here, but honestly not that many. Maybe six or eight, total. They just tend to post 50 times each in any thread that touches on the subject.

Capital is inherently conservative and this is a website focused around venture capitalism. It makes sense that more than average this website's users/staff would lean towards more conservative politics than a random sample of Internet users. This should be even more clear when you read pg's essays. Of course this has an effect on the moderation, including voting/flagging.