CHICAGO, IL - SEPTEMBER 23:  Illinois gubernatorial candidate Bruce Rauner leaves a campaign event on September 23, 2014 in Chicago, Illinois. Christie, who heads the Republican Governors Association (RGA), was in town to campaign for Rauner. Recent polls show Rauner, a Republican, is in a dead heat with incumbent Pat Quinn, his Democratic opponent.  (Photo by Scott Olson/Getty Images)