Former Mexico state governor Enrique Pena Nieto, a potential presidential candidate for the opposition Institutional Revolutionary Party (PRI), speaks during a Confederation of National Chambers of Commerce, Mexico (Concanaco) event in Mexico City November 25, 2011. Pena Nieto, the frontrunner in Mexico’s 2012 presidential race, on November 27, 2011 registered in Mexico City as the official presidential candidate of the PRI. Picture taken November 25, 2011. REUTERS/Henry Romero (MEXICO – Tags: POLITICS ELECTIONS) ORG XMIT: HNR05