Paul Kramer in Slate on President Trump's immigration ban and its links to US immigration and foreign relations history:
Both stories about immigration and America—that there was a glorious past in which America was pure and protected from outsiders, or that Americans have always prized multicultural inclusion—remake the past to score political points in the present. In fact, Trump’s vile exercise in nativism—the xenophobic celebration of the national self—is only the latest maneuver in a series of battles over immigrants’ role in American life and America’s place in the world. Viewed historically, the claim that these anti-immigrant policies are “not who we are,” while stirring, does not hold water. American nativist politics have deep roots.