Nate Cohn writes for NYT’s “The Upshot.”

Democrats often blame gerrymandering, but that’s not the whole story. More than ever, the kind of place where Americans live — metropolitan or rural — dictates their political views. The country is increasingly divided between liberal cities and close-in suburbs, on one hand, and conservative exurbs and rural areas, on the other. Even in red states, the counties containing the large cities — like Dallas, Atlanta, St. Louis and Birmingham — lean Democratic.