Question: 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?
Sentence (from "Donald Rumsfeld"): Additionally, Rumsfeld was a three-term U.S. Congressman from Illinois (1963–1969), Director of the Office of Economic Opportunity (1969–1970), Counsellor to the President (1969–1973), the United States Permanent Representative to NATO (1973–1974), and White House Chief of Staff (1974–1975).
Relevant evidence: No