(FILES) Place publique's centre-left party leader and France's MEP Raphael Glucksmann marches as he takes part in a May Day (Labour Day) rally, marking International Workers' Day, in Rouen, northern France on May 1, 2026. With the publication of a book "Nous avons encore envie" on May 28, 2026, and along with a rally, European Member of Parliament Raphael Glucksmann hopes to build momentum before the summer ahead of a possible declaration of candidacy for France's 2027 presidential election. (Photo by Lou BENOIST / AFP via Getty Images)