Many of us have come to identify Trumpian America as a kind of mirror image of Jacksonian America of the 1830s. They both, for example, shared a common distrust of any form of expertise, aggressively insisting instead that all important functions are simple enough to be performed by any ordinary citizen. And above all, they both had a strong desire to overthrow whatever they thought represented the establishment. We’ve come to realize, I think, that large parts of the population harbor nativist prejudices, which are surprisingly easy to make come to the surface.