Former French Economy Minister and candidate for the left-wing primary ahead of the 2017 presidential election Arnaud Montebourg waves as he attends La Fete de l'Humanite in La Courneuve, near Paris, on September 10, 2016. Decided candidates running for the Presidential elections, trade unions against the labor law: La Fete de l'Humanite (Humanity Festival) announces a troubled autumn for the left wing. / AFP PHOTO / Thomas SAMSONTHOMAS SAMSON/AFP/Getty Images