Maths wizard Cédric Villani adds to Macron woes in Paris mayoral equation

Mathematician-turned-politician Cédric Villani wears his eccentricity on his sleeve – or, at least, on the lapel of his three-piece suit. There lurk his signature spider brooches. They stalk alongside his silken Ascot neckties and above his pocket watch, even on the campaign trail, where Emmanuel Macron's now ex-protégé is stumping for one of French politics’ most coveted prizes: The Paris mayor’s office.