Mexico's new president, Enrique Pena Nieto, has made big promises in a country with a mixed record. Jacquelyn Martin/AP hide caption

itoggle caption Jacquelyn Martin/AP

County Sheriff Lee Baca faces what may be the toughest fight of his 14-year political career. Damian Dovarganes/AP hide caption

itoggle caption Damian Dovarganes/AP

A city worker sells eggs as people line up outside the truck in Mexico City on Aug. 24. The Mexican government is battling an egg shortage that has caused prices to spike in a country with the highest per-capita egg consumption on Earth. Alexandre Meneghini/AP hide caption

itoggle caption Alexandre Meneghini/AP