Place publique's centre-left party leader and France's MEP Raphael Glucksmann (L), flanked by Mayor of Rouen Nicolas Mayer-Rossignol (R) and Yannick Jadot (C), march as they take part in a May Day (Labour Day) rally, marking International Workers' Day, in Rouen, northern France on May 1, 2026 (Photo by Lou BENOIST / AFP via Getty Images)

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 (Photo by Lou BENOIST / AFP via Getty Images)

Place publique's centre-left party leader and France's MEP Raphael Glucksmann takes part in a May Day (Labour Day) rally, marking International Workers' Day, in Rouen, northern France on May 1, 2026 (Photo by Lou BENOIST / AFP via Getty Images)

A demonstrator holds a placard reading "Capitalism is war. Workers of the world, let's overthrow it", during a May Day (Labour Day) rally, marking International Workers' Day, in Marseille, on May 1, 2026. (Photo by MIGUEL MEDINA / AFP via Getty Images)

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 (Photo by Lou BENOIST / AFP via Getty Images)

Place publique's centre-left party leader and France's MEP Raphael Glucksmann (C) speaks to journalists as he takes part in a May Day (Labour Day) rally, marking International Workers' Day, in Rouen, northern France on May 1, 2026 (Photo by Lou BENOIST / AFP via Getty Images)

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 (Photo by Lou BENOIST / AFP via Getty Images)

A demonstrator holds a placard reading "Manu, hands off May 1st", during a May Day (Labour Day) rally, marking International Workers' Day, in Marseille, on May 1, 2026. (Photo by MIGUEL MEDINA / AFP via Getty Images)