This is a false equivalence - r/politics is not the left leaving equivalent of r/The_Donald. Trump supporters weren't broadly banned from political subreddits,

This is a false equivalence - r/politics is not the left leaving equivalent of r/The_Donald. Trump supporters weren't broadly banned from political subreddits, just the ones that broke the rules did, like everyone else. r/politics is a left leaning echo chamber, yes, but you won't get banned for being pro Trump (just downvoted). On the other hand, you will get banned from r/The_Donald or r/conservative for being anti-Trump.