Advisor perhaps?
Longtime uber-lobbyist Charles R. Black Jr. is John McCain's man in Washington, a political maestro who is hoping to guide his friend, the senator from Arizona, to the presidency this November.
But for half a decade in the 1980s, Black was also Jonas Savimbi's man in the capital city. His lobbying firm received millions from the brutal Angolan guerrilla leader and took advantage of Black's contacts in Congress and the White House...
In addition to Savimbi, Black and his partners were at times registered foreign agents for a remarkable collection of U.S.-backed foreign leaders whose human rights records were sometimes harshly criticized, even as their opposition to communism was embraced by American conservatives. They included Philippine President Ferdinand Marcos, Mobutu Sese Seko of Zaire, Nigerian Gen. Ibrahim Babangida, Somali President Mohamed Siad Barre, and the countries of Kenya and Equatorial Guinea, among others..."
http://www.msnbc.msn.com/id/24769387



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