Perfectly happy to draw a line in the sand, it should just be based on what we care about - competence, intelligence, experience, not being a raging psychopath… that kind of thing. Saying 65 is too old is no better than saying 35 is too young.

All candidates for elected office should undergo standardized cognitive and psychological testing. The latter should include things like personality and bipolor disorder tests and some kind of personality test if there even one that is roughly valid (I don’t know). These tests should not bar anyone from office necessarily but the results should be made public so voters can assess for themselves. These tests should be completed immediately after the candidate files to run.