Conversation so far:
What are David Rockefeller's political connections?
At times David Rockefeller served as an unofficial emissary on high-level business. Among the foreign leaders he met were Saddam Hussein, Fidel Castro, Nikita Khrushchev, and Mikhail Gorbachev.
What else did David Rockefeller do besides serve as an unofficial emissary?
President Jimmy Carter offered David Rockefeller the position of United States Secretary of the Treasury but he declined.

Question: How else was Rockefeller involved in politics?
Self-contained rewrite: How else was David Rockefeller involved in politics besides serve as an unofficial emissary?