MEXICO CITY _ Mexico's long-dominant ruling party appears to have narrowly held on to power in closely watched elections in the country's most populous state, according to preliminary results released Monday.
With almost 98 percent of the votes counted in Sunday's Mexico state elections, the ruling Institutional Revolutionary Party's candidate for governor led by almost 3 percentage points over the candidate of the left-wing National Regeneration Movement, or Morena.
The heavily contested election in a state where the ruling party, known as PRI, has never lost was seen as a key test for the party in advance of next year's presidential election.
Still, analysts said Morena's strong showing demonstrated considerable vigor for an upstart movement that has never held a governor's seat. The PRI reportedly spent tens of millions of dollars to support its candidate to stave off what would have been a humiliating defeat.
"It's almost a Pyrrhic victory" for the PRI, columnist Georgina Morett wrote Monday in Mexico's El Financiero newspaper. "What was the cost per vote of a victory of only 2 points?"
In the northern state of Coahuila, the PRI candidate was also slightly ahead in the election for governor, results showed.
Like the state of Mexico, Coahuila has long been a PRI stronghold.
The ruling party appeared headed for a loss in the governor's race in the small coastal state of Nayarit. Antonio Echevarria Garcia, representing an opposition coalition headed by the conservative National Action Party, held a commanding lead over the PRI candidate.
The party's image there took a hit in March when U.S. authorities arrested the state's attorney general _ a longtime PRI stalwart _ on drug trafficking charges.
The preliminary numbers released early Monday are official results based on a raw count of votes. Final, certified results are expected Wednesday, after all parties have a chance to challenge the counts from thousands of individual polling stations.
Electoral authorities reported receiving complaints of hundreds of voting irregularities Sunday, including alleged intimidation of voters and efforts by ineligible voters to cast ballots. It was not clear Monday whether the complaints would affect the final vote tally.
The most significant contest was in the state of Mexico, which has more than 11 million voters, the most in the country. The state is a historical bastion of the PRI, which has ruled the area since the party was founded in 1929 after the Mexican Revolution.
Many analysts predicted that a PRI defeat there would spell doom for the ruling party in next year's presidential election.
President Enrique Pena Nieto, the PRI standard-bearer and himself a former governor of the state, has low approval ratings with widespread concerns about rising crime, corruption and a sluggish economy.
The results released Monday from Mexico state showed the PRI candidate for governor, Alfredo Del Mazo Maza, having won 33.7 percent of the vote, compared with 30.8 percent for Delfina Gomez of Morena.
Del Mazo, scion of a PRI dynasty _ and a distant cousin of Pena Nieto _ declared victory late Sunday in a rally at his campaign headquarters.
Morena and its founder, Andres Manuel Lopez Obrador, disputed the preliminary results and vowed to challenge the count, but it was unclear whether the protest would gain any traction. Lopez Obrador has alleged that he was cheated out of two presidential victories, in 2006 and 2012, a charge dismissed by his opponents.
The preliminary results in the race for governor demonstrated that a fracturing of the left vote was key to the success of the centrist PRI.
Running a strong third in the race, with almost 18 percent of the vote, was Juan Zepeda of the left-leaning Democratic Revolution Party, the former party of Lopez Obrador, who rejected joining forces to present a unified left ticket against the ruling party.
An upset victory Sunday for Morena in Mexico state would have been a big boost for Lopez Obrador's presidential ambitions. He is regarded as an early presidential front-runner _ though major parties have yet to name their candidates in national election scheduled for July 2018.
The president of the PRI, Enrique Ochoa Reza, said the party's apparent victory in Mexico state was a blow to "populist authoritarianism," a clear allusion to Lopez Obrador, a left-wing populist.
Lopez Obrador has rejected as "lies and calumnies" the PRI's frequent likening of his policies with those of the embattled leftist leadership in Venezuela, which is gripped by economic, social and political chaos.
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(Cecilia Sanchez of The Times' Mexico City bureau contributed to this report.)
