Hmm:

But in a moment of candor Monday night in his office, Stewart said that while he is looking forward to serving in a third term, this may very well be his last time he will run for mayor, because he is tired of the troubles that come with the position.
He said the Democrats have hit a new low, and he can’t stand to see good public policy sabotaged “just because someone is trying to create an issue.”
“I have no plans to run again for mayor after this election,” he said.

From the New Britain Herald. Emphasis added.
Yes, it must be a huge pain in the ass to be Mayor of New Britain, what with people out there disagreeing with you and all. Why not consider someone who is willing to put up with all the “trouble” of running a city?