Robert Reich on the nation's divides -- note or a discussion, "E Pluribus Unum? What Keeps the United States United"

So the Republican convention begins at precisely the time when the nation is convulsed over widening divides – not only of race but also of religion and of class -- and at a time when violence is more palpable than at any time in years. Into that breach comes Donald Trump, who has done more than any presidential candidate in American history to widen those divides, incite hatred, and legitimize violence.

How did we get to this point?