So long as America is powerful, its diplomacy will continue to be powerful. The problem is that American's diplomacy has been corrupted. US values within the US so much the envy of the entire world are no where to be found when America flexis its foreign diplomatic muscle. America's foreign policy is nothing like American internal structures and values (even some of that is being corrupted like with spying on Americans etc).

Another major problem in US diplomacy is the exagerated effects of domestic political issues and lobbyists on the way the US conducts itself outside American territories. The overblown and exagerated powers of the pro Israel lobby are hurting the image of the US abroad and are causing American diplomats in effect to be working for something other than the interest of America. This is really the corruption of American diplomacy.