Under which president did this American retired politician and businessman serve as Secretary of Defense most recently that St. Petersburg Democratic Club's controversial "The Gabber" advertisement focused on?
St. Petersburg Democratic Club (United States):  In April 2004, it attracted massive negative national attention after placing an advertisement in a Gulfport, Florida weekly "The Gabber"mildly suggesting the killing of United States Secretary of Defense Donald Rumsfeld. Donald Rumsfeld: Donald Henry "Don" Rumsfeld (born July 9, 1932) is an American retired politician and businessman. Donald Rumsfeld:  Rumsfeld served as the 13th Secretary of Defense from 1975 to 1977 under President Gerald Ford, and as the 21st Secretary of Defense from 2001 to 2006 under President George W. Bush.
George W. Bush