Cow, ok assisination is much too blunt an instrument for US foreign policy...coups on the other hand help to keep the blood off of US hands while achiveing some of the same ends.
http://en.wikipedia.org/wiki/List_of...ons_since_1945
Disclaimer: these are all alleged
[Assuming a pro-cuban pro-venzualan government wins in Boliva] If the Bolivian opposition came to CIA and said "Would you please sponsor our coup of the democratically elected government" I personally doubt that the US (CIA) would reject the idea because it would undermine democracy. They might reject it b/c for many other reasons, but protecting democracy wouldn't be one of them.
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ROLL A JOINT