Sorry for being imprecise, trying to avoid a lengthy political debate. There are many examples when American actions have helped put and keep despots in power because of perceived American interests. If we expand the criteria to include examples of American interests sustaining systems which keep despots in power, we can find even more examples. Either way, America hasn't had a non-interventionist foreign policy in a long time, and it's both frightening and insane that some still see it as a mythical white night battling for good in the world.