Is Trump turning point in world politics?

By Joseph S. Nye, Jr. CAMBRIDGE ― As the United States enters the home stretch of the 2020 presidential election campaign, and with neither party's nominating convention featuring much discussion of foreign policy, the contest between President Donald Trump and Joe Biden apparently will be waged mainly on the battleground of domestic issues. In the long run, however, historians will ask whether Trump's presidency was a major turning point in America's role in the world, or just a minor historical accident. At this stage, the answer is unknowable, because we do not know if Trump will be re-elected. My book Do Morals Matter? rates the 14 presidents since 1945 and gives Trump a formal grade of...