Evan Bayh isn't elderly, but I don't think we've seen the last of him.
He seems rather content making infrequent appearances on FOX as one of their token Democrats.
This. Open senate seat and a weak incumbent at Governor in Indiana this cycle, Bayh didn't jump. He's most likely done with elected office.
The money's too good (he's also a professional corporate board member) and it still is too early after he randomly bailed on the Senate seat at literally the last minute to make a solid run. If he does come back at all, he'll probably run in 2020.