The shocking result of the "Brexit" referendum, with Britain leaving the European Union, has widely been taken as Good News for Donald Trump. He was happy to say so himself, and to attempt to take credit somehow for the referendum's success. And people have been panicking about the danger that Trump's campaign could beat the conventional wisdom just as the British "Leave" campaign did. That danger is probably overrated, as Jamelle Bouie points out: the UK is much whiter than the US, so the angry white vote doesn't carry as far here any more, and we should remember that the Brexit result wasn't really a surprise: "Leave" and "Remain" had been polling neck-and-neck down to the wire, so the 52-48 result wasn't unlikely. But Trump, who led the Republican primary polls wire to wire, is clearly behind in the general-election polls. On the other hand, it's easy to see Trump and the Brexiteers as part of a wider movement: angry nativist populists, hostile to policy experts and welcoming to xenophobes and racists. That movement won't meet with the same success everywhere, but it's real.