It's more difficult to get demodded than impeached.
Not if the right cards are played. Mr. Morden was becoming a threat due to his long tenure and pretty amazing popularity, and he was definitely my most impressive removal so far. I intend to cycle Nym, muon2, and eventually Dave out, if they ever become too popular. So far, Kalwejt's popularity has fallen since he became a moderator. So long as it doesn't start to climb, he should be safe.
As for Trump, smilo's busy getting the last dozen or so votes as "padding" in case anyone betrays me, but I doubt we'll ever impeach him unless he becomes popular.