Corruption and violence test Mexico ruling party in state elections

By Dave Graham XALAPA, Mexico (Reuters) - Mexican regional elections on Sunday pose a major test for the ruling party's hopes of retaining the presidency in 2018 as discontent over corruption and violence fuels support for the anti-establishment message of a resurgent leftist firebrand. Voters were choosing new governors in a dozen of Mexico's 31 states, including bastions of President Enrique Pena Nieto's Institutional Revolutionary Party, or PRI, that could fall to the opposition after more th