[Chuck] was probably nervous. There was a lot of activity outside, and he was probably nervous. He was basically concentrating on his food. The mayor’s fingers may have just been there. He wasn’t necessarily going for the mayor.
Not necessarily. Or maybe Chuck simply objects to the Mayor's end-run around the term limits law, and decided this was the most participatory form of democracy available to him.
The NYT writeup has more details, including the Mayor's thoughts.