Donald Trump returned to the United Nations General Assembly stage this week with trademark bravado. He mocked the U.N. as a place of “empty words,” urged nations to slam their borders shut, and presented his worldview as if it were the…

Donald Trump returned to the United Nations General Assembly stage this week with trademark bravado. He mocked the U.N. as a place of “empty words,” urged nations to slam their borders shut, and presented his worldview as if it were the…