Federal Judge Richard Posner: The GOP Has Made Me Less Conservative
"I've become less conservative since the Republican Party started becoming goofy," he said.
The text article doesn't adequately convey his attitude. You have to listen to the audio at the link to fully appreciate his derisive chuckling at "this crowd of lunatics."

Q: How can you tell when you're about to jump the shark?

A: You can't, or else you wouldn't do it. By definition it's a surprise.