What is it with you and Richard Nixon?
Better question, what's with everyone else here and JFK?
Dodging! Tsk tsk.
Doesn't change the point at all.
Nixon, even as a criminal or a bit of plastic, just keeps being the least evil or least incompetent option in most of the half century he had power, and once he was out, the New Gilded Age was beginning. Both sides governed to the right of him by default, and his own party went off the ethical deep end.
JFK was just under camp incompetent for the time, propped up by riches and telegeny. While he did end up better, that would be hard to gauge without hindsight.
And that's not even going into The Butterfly Effects.