Josefina Vazquez Mota, presidential candidate of the ruling National Action Party (PAN), holds up an unmarked ballot for president before casting her vote in the general elections at a polling station in Huixquilucan, Mexico, Sunday, July 1, 2012. Mexico's more than 79 million voters head to the polls Sunday to elect a president, who serves one six-year term, as well as 500 congressional deputies and 128 senators. (AP Photo/Andres Leighton) Photo: Associated Press