In the terms coined by Walter Russell Mead, Obama is a Jeffersonian, while Trump is a Jacksonian: The former believes that the United States should perfect its own democracy and go “not abroad in search of monsters to destroy,” whereas the latter believes that “the United States should not seek out foreign quarrels” but that it should clobber anyone who messes with it. What unites Jeffersonians and Jacksonians, in spite of their substantial differences, is that both support quasi-isolationism — or, if you prefer, noninterventionism — unless severely provoked.
Obama has been intent on pulling the United States back from the Middle East.Obama has been intent on pulling the United States back from the Middle East. The result of his withdrawal of troops from Iraq and his failure to get more actively involved in ending the Syrian civil war has been to create a vacuum of power that has been filled by the likes of the Islamic State and Hezbollah. Undaunted, Trump has said he wants not only to continue the pullback from the Middle East (he wants to subcontract American policy in Syria to Putin) but also to retreat from Europe and East Asia. He has suggested that he may lift sanctions on Russia and pull U.S. troops out of countries (from Germany to Japan) if he feels they are not paying enough for American protection. It is quite possible, then, that Trump’s foreign policy would represent an intensification rather than a repudiation of Obama’s “lead from behind” approach.
American power survived eight years of an Obama presidency, albeit in diminished form. If the president-elect governs the way he campaigned (which, admittedly, is not necessarily a safe assumption), there is good cause to wonder whether U.S. ascendancy will survive four to eight years of Trumpism. The post-American age may be arriving sooner than imagined, ushered in by a president with an “America First” foreign policy.
From: Trump’s ‘America First’ Is the Twilight of American Exceptionalism | Foreign Policy