Kingsport Alderman John Clark Has Formally Announced His Bid For Mayor Of The Model City. The 35 Year Manufacturing Executive Has Stepped Down From His Role As Vice President With AGFA Health Care’s North American Operation To Devote His Full Time Efforts To Becoming Mayor. Clark Says He Wants To Lead Kingsport With A Big Focus On Expanding The Economy. His Campaign Headquarters Will Be Located At 111 West Market Street.