Fifty-six years ago in August 1968, Richard Nixon achieved what The New York Times called “the greatest reversal of fortune in American political history.” Times columnist James Reston went further, calling it “the greatest comeback since Lazarus.” This from a newspaper, along with The Washington Post, that hated Nixon, as they now hate Donald Trump. How did he do it and could presumptive Republican presidential nominee and former president Trump learn anything from Nixon’s seeming transformation? First, the parallels between Nixon and Trump are striking. Nixon, like Trump, believed America was in bad shape. In 1968, crime, the war in...