Pretty sure there isn't.

HN has lots of hellbanned bots lately (I have showdead on [1]) but I never notice ones pushing a political slant. But I suppose nation states conducting a campaign on Hacker News would be much too cunning to make the bots obvious

[1] because many posts get wrongly flagged, apparently in part by trigger-happy users who will flag anything with incidental similarities to AI prose (everyone, PLEASE STOP DOING THAT), in part because HN's automoderation is severe for new users, and in part because plenty of people get hellbanned either unfairly or although they do still write plenty of worthwhile posts. I even rescued someone who it turned out had been hellbanned by a mod by accident.