Arnaud Montebourg is an ambitious man. A serious presidential run is still a way off, but he's young. He's also willing to stick his neck out: witness his report on corruption in the Socialist federation of Bouches-du-Rhône under Baron Jean-Noël Guérini. Yet the party leadership continues to defend its baron. Montebourg may suffer in the short run, but in the long run perhaps he'll get some credit for daring.