The USA is actually ruled by the following groups:-
1.Trilateral Commission,a braichchild of David Rockefeller
2.CFR(Council On Foreign relations)
The US Prez is only a figurehead.Please use the following link:-
http://www.bilderberg.org
To know about Trilateral Commission and CFR please use a search engine,like Yahoo or Google,although,the link above contains material regarding both.