Republican gubernatorial candidate Christopher Christie, potentially auditioning running mates, will join Bergen County Clerk Kathleen Donovan on a tour of downtown Rutherford on Thursday morning. Donovan is widely considered to be one of the top candidates on Christie's short list for Lt. Governor. Last week, Christie campaigned with another LG aspirant, State Sen. Diane Allen (R-Edgewater Park). Senate Minority Leader Thomas Kean, Jr. (R-Westfield), widely viewed as a top contender for the number two spot on the Republican ticket, said last Friday that he was not interested in running for Lt. Governor.