Mexico’s President Felipe Calderon holds his vote near a polling booth with a sign that reads ‘The vote is free and secret’ in Mexico City July 1, 2012. Mexicans began voting for a new president on Sunday with the opposition party that dominated the country for most of the past century poised for a comeback after the ruling conservatives failed to provide strong growth or halt a brutal drugs war. REUTERS/Henry Romero (MEXICO – Tags: POLITICS ELECTIONS)