France's ruling Socialist Party suffered humiliating losses on a day dubbed "Black Sunday" in a local vote marked by breakthrough successes for the far-right National Front and the historic election of a first female mayor of Paris. On a day dubbed "Black Sunday" by one Socialist lawmaker, the National Front (FN) won control of at least fourteen towns, according to the interior ministry and was on track to claim 1,200 municipal council seats nationwide, its best ever showing at the grassroots level of French politics. It was also a night to savour for France's main opposition, the centre-right Union for...