Open this photo in gallery: Alice Weidel, co-leader and chancellor candidate of the far-right Alternative for Germany (AfD), and AfD co-leader Tino Chrupalla stand on stage with flowers at AfD headquarters after the announcement of initial results in snap federal parliamentary elections, on Feb. 23, in Berlin.Sean Gallup/Getty Images For the first time since the Second World War, a far-right party has come second in a German national election, a result that will keep it outside government but make it a fearsome opponent of the ruling parties. The Alternative for Germany, which has morphed since it was founded in 2013...