I originally included Kuchel in the draft version of my post, but I decided to limit it to governors. Indeed, Kuchel was a pill. The Republicans finally ousted him in the 1968 primary, but although Max Rafferty, who beat Kuchel, was an excellent candidate, he narrowly lost to Democrat Alan Cranston.
“he narrowly lost to Democrat Alan Cranston.”
Alias “the Skull”
IIRC Cranston had a son whose exploits rival Hunter Biden’s.