Boris Yeltsin was not a puppet of USA. He destroyed Mikhail Gorbachev which was openly an open mind people and a lover of free world. As such lover of European Union and United States of America. It was not possible that Boris Yeltsin made this if he was a puppet of USA. Then, and the most important, this puppet, has "nominated" (this is the right word: nominated) as its successor precisely that Putin which the most wild enemy of United States.
The only true thing that can be told about Boris Yeltsin is that he was an alcoholised.