Supporters of Francois Hollande, Socialist Party candidate for the 2012 French presidential election, attend a campaign rally outside the Chateau de Vincennes, in Paris, April 15, 2012. Presidential rivals Nicolas Sarkozy and Hollande stage competing rallies in Paris Sunday in a last ditch battle for votes, just a week before elections. REUTERS/Charles Platiau (FRANCE - Tags: POLITICS ELECTIONS)