Detroit is bankrupt, and under an emergency manager. It has greatly reduced potential for graft, so continuing to be mayor is unattractive.
Wayne county includes Detroit plus the surrounding suburbs. There's still money there, and opportunities to skim money to himself and his friends.
Aha. Like locusts that move on after devouring everything edible, so too will Bing?
Another ignorant poster who is completely clueless on who Dave Bing is and what he has accomplished on his own.....