Mayor Rahm Emanuel’s communications director, Sarah Hamilton, who plans to resign next month, said her resignation has nothing to do with Emanuel’s recently-declining popularity; Hamilton said, “I talked about this with the mayor a month ago,” adding, “He’s a fantastic person to work with,” but, “It’s time to move on”; Hamilton will be succeeded by Kelley Quinn, who has worked for ex-Gov. Rod Blagojevich and Chicago Public Schools