Trump's foreign policy is not so unusual for the US – he just drops the facade of moral leadership

JD Vance is an Iraq war veteran and the US vice-president. On Friday, he declared the doctrine that underpinned Washington's approach to international relations for a generation is now dead. "We had a long experiment in our foreign policy that traded national defence and the maintenance of our alliances for nation building and meddling in foreign countries' affairs, even when those foreign countries had very little to do with core American interests," Vance told Naval Academy graduates in Annapolis, Maryland. His boss Donald Trump's recent trip to the Middle East signified an end to all that, Vance said: "What we're…