Factbox - Mexico ruling party loses powerful states in regional vote

The ruling party of Mexican President Enrique Pena Nieto lost several historical strongholds on Sunday in an election largely seen as a referendum on corruption, impunity, and violence across the country. Results showed the Institutional Revolutionary Party, or PRI, losing six of 12 gubernatorial races in the country, with contenders on both the right and left making gains. The PRI formerly held nine of the 12 governorships.