Identity has always been at the heart of American culture. We must confront a truth that we have assiduously avoided: The most protected, cherished and nurtured identity of all has been white identity. After all, the needs of the black and brown working classes, which are not exclusively urban, are, again, even in progressive quarters, all but forgotten.
Mr. Trump, and to a degree, the liberals and progressives who advocate a vision of America that spurns identity politics, make one thing clear: The real unifying force in American political life is whiteness, no matter its party, gender, region or, at times, even its class.