A Mexico primer: Will it be an opposition leader, a first female, or last election's disgraced runner-up? Polls give Enrique Peña Nieto, of the main opposition party, a double-digit lead over both rivals.
Mexican presidential candidate Josefina Vazquez Mota (C) celebrates her victory with her counterparts Santiago Creel (L) and Ernesto Cordero (R) from National Action Party (PAN in Spanish) during a press conference in Mexico City on February 5, 2012. Mota is the official presidential candidate of the National Action Party. (ALFREDO ESTRELLA/AFP/Getty Images)
Mexico's ruling National Action Party (PAN) has chosen female candidate Josefina Vázquez Mota as its candidate for July's election, ready to take on current frontrunner, the Institutional Revolutionary Party's (PRI) Enrique Peña Nieto.