Supporters of Argentine President Cristina Fernandez de Kirchner celebrate Fernandez won the presidential election at the Plaza de Mayo square in Buenos Aires October 23, 2011. Argentina's fiery center-leftist president Fernandez swept to a landslide re-election victory on Sunday, crowning a comeback that seemed unthinkable for much of her turbulent first term. REUTERS/Martin Acosta (ARGENTINA - Tags: POLITICS ELECTIONS)