"In 2016, I'm going to leave it all out on the field. Wherever there's an opportunity, I'm going to take it." ~ Obama
The idea of regime changes did not start on Obama's watch, and the evil dictators who must be removed from power were not always evil dictators. There is sufficient information to research regarding the history of U.S. relations with various countries and their leaders. The U.S. has been instrumental in bringing many of these supposed mad men to power, then later calling for a regime change, and the eventual destruction of their one time allies.
So what changes? Like other matters of money, resources, and power influences, when a player is no longer needed, or when they are conveniently needed for other purposes, they are declared an evil dictator and become expendable. I'm not going to rehash all the specific histories and examples of U.S. betrayal and global manipulation. What?!? U.S. betrayal and global manipulation? Is the U.S. in need of a regime change?