Has Steve Bannon outlived his usefulness to The Donald John. Did he jump the shark by backing Roy Moore and getting Trump to do so too?

For those who don't know what "jumping the shark" means it refers to the TV show Happy Days. It is the one were The Fonz waterskies. After that episode I guess viewership declined. I didn't see anything wrong with it but I guess other folks did. "Jumping the shark" is the Waterloo moment. Waterloo was where Napoleon was decisively defeated.