When Trump became president, much of the country was repelled by what they saw as the vulgar spectacle of his ascent, a perversion of the highest office in the land. In his bold, innovative book, Political Perversion, rhetorician Joshua Gunn argues that this "mean-spirited turn" in American politics (of which Trump is the paragon) is best understood as a structural perversion in our common culture, on a continuum with infantile and "gotcha"...