Casey Wright rides World Grand Champion I Am Jose in the 2013 Tennessee Walking Horse National Celebration in Shelbyville.(Photo: Photo courtesy of Shane Shiflet)Story HighlightsThe Tennessee Walking Horse National Celebration is held each August in Shelbyville.The Prevent All Soring Tactics Act would end the sport's performance division.Opponents of the bill argue that it will crush Shelbyville's economy and not end soring.