Arturo Montiel and Roberto Madrazo clap during a meeting in Mexico City.
Arturo Montiel, governor of Mexico's most populous state (L) and Institutional Revolutionary Party PRI leader Roberto Madrazo clap during a meeting at the party's headquarters in Mexico City August 31, 2005. The opposition PRI picked Montiel to run against party leader Madrazo for its presidential nomination. Montiel was chosen as candidate of the Democratic Unity group inside the PRI, which ruled Mexico for most of the 20th century until it was ousted in the 2000 elections. REUTERS/Henry Romero HR/JJ