In what was probably the most important presidential speech in decades, President Donald Trump repudiated decades of failed interventionist U.S. foreign policy in the Middle East during an official visit to Riyadh, Saudi Arabia, on Tuesday. Not only did Trump lambast neocon “nation-building” in the region, he more or less vowed never to pursue the kinds of neocon misadventures that spilt American blood and treasure over the past 25 years in the insane pursuit of creating western liberal...