That would be something of a demotion, wouldn't it?
No. Federal level is higher than municipal level.
Who says?
Me. Senate is highest statewide. Next is governor. Next is other statewide. Next is House. Next is state legislature. Next is mayor.
You're forgetting that a lot of politicians aren't just pawns on a chess piece; some of them love having control over budgets, over a large staff & being able to set an agenda.
I know of a lot of MPs in this country who've taken much smaller jobs afterwards and found them 100% more enjoyable and fufilling.