The far-right Alternative für Deutschland has won a district council election in Germany for the first time in what is being referred to as a watershed moment in the country’s politics. The eastern German town of Sonneberg, in the state of Thuringia, elected Robert Sesselmann to the post of district administrator, the equivalent of a mayor, with 52.8%, ousting the Christian Democrats’ (CDU) Jurgen Köpper on 47.2%. The Thuringia branch of the anti-immigrant party has been classed as rightwing extremist by intelligence services. It is led by Björn Höcke, who is considered to be part of the AfD’s far-right or...