AfD takes 13% in Berlin metropolitan elections. It was non-existent the last time they held them, and both the lamestream center-right party (CDU, of Angela Merkel) and the center-left party (SPU), lose ground, though both finished ahead of AfD.
Because Berlin is thought to be a universal cosmopolitan city, that AfD wouldn’t do that well there, for the same reason UKIP was a non-entity in London. That thought entered my mind, too. And I could have just as easily forecasted that as I would have what actually happened. Like a handful of Alt-Right political theorists have thought for a long time, there is a sleeping giant electoral constituency in major urban areas who despise the center-left, are uncomfortable with the center-right, and will show up if there’s some sort of a populist-nationalist credible option. It’s the same reason why Trump cleaned up in Acela states.