HN has had plenty of discussions of the Trump administration. A certain amount is ok—it depends on the story—but the latest news about who may or may not have spoken to an ambassador doesn't come close to the threshold. It's not a borderline call; it's not even in the ball park. If we allow that, we allow everything. In that case politics would certainly take over the site. This story was at #1 before we demoted it!
The worst thing to post or upvote is something that's intensely but shallowly interesting: gossip about famous people, funny or cute pictures or videos, partisan political articles, etc. If you let that sort of thing onto a news site, it will push aside the deeply interesting stuff, which tends to be quieter.
