As with many of his Republican predecessors, Trump has effectively tapped into the sense among millions of Americans that pride in the United States is diminishing, not only abroad but at home. Many of his supporters share a sentiment that D.C., N.Y. and L.A. “elites” are embarrassed about our country and our achievements. This is why, as a candidate for the White House, Trump frequently lambasted President Barack Obama for his alleged global “apology tour.” It’s why he’s waded into the protection of confederate monuments and claimed that George Washington, Thomas Jefferson and Abraham Lincoln might be the next to...