http://mostliberalsenator.blogspot.com/
...and "imperialism" isn't necessarily dependent on physically occupying a territory or enclosing it within borders. The US can impose it's will on other countries, and it does whenever necessary or even sometimes expedient. This happens regardless of any one country's national interest. To say we're not imperialistic because to be so is to be like Europe in Africa, physically there and overtly running the show, is to deny that Europe still has a high degree of represented interest in Africa.
The Third World is always looking down the barrel of someone's gun. The barrels have only gotten longer.