MEXICO CITY -- Hours after voters returned his former ruling party to power, Enrique Pena Nieto thanked Mexicans for offering a "second chance" and promised to abandon the partys autocratic ways and preside over a modern, inclusive administration.
We are a new generation. There is no return to the past, the 45-year-old former governor pledged in a victory speech at the headquarters of his Institutional Revolutionary Party.
Pena Nieto declared that he understands the changes that the country has experienced in recent decades, and will act according to the new reality.
I will pursue a modern presidency, he added, responsible, open to criticism, willing to listen and take account of all.
With 81 percent of voting precinct tallies counted, Pena Nieto led with 37.4 percent of votes, followed by Andres Manuel Lopez Obrador of the leftist Party of the Democratic Revolution with 32.4 percent.
Trailing behind were Josefina Vazquez Mota of the ruling center-right National Action Party (PAN) with 25.4 percent and a fourth candidate, Gabriel Quadri de la Torre of the New Alliance with barely over 2 percent.
President Felipe Calderon, whose PAN lost badly in Sundays vote after 12 years of rule, promised an orderly, transparent and efficient transition.
I want to sincerely congratulate him, Calderon said of Pena Nieto.
Lopez Obrador declined to concede the triumph to Pena Nieto, a boyish-looking 45-year-old married to a television soap opera star. He said he would await all the results before speaking further.
Many Mexicans voted in a sour mood over drug-war violence and an economy only recently gaining steam. They were ready to give a new chance to a party that ruled from 1929 until 2000, casting aside concerns over its autocratic past.
Scattered irregularities were reported at a few of the nations 143,000 voting stations, but for the most part the vote appeared calm and orderly.
In a closely watched race in the capital, exit polls gave a landslide victory to the Party of the Democratic Revolutions Miguel Angel Mancera, allowing the party to hang on to Mexico City Hall, which it has controlled for a decade and a half.
It is an election that has been closely watched in the United States. Not only does the United States share a nearly 2,000 mile border with Mexico, but the two countries have key mutual interests in areas such as trade, energy, homeland security and migration. Mexico is the third largest U.S. trading partner (after China and Canada) and also a vital source of crude oil to U.S. markets.
As many as six million U.S. jobs depend on trade with Mexico and 10 million U.S. citizens visit Mexico every year. Increasingly, criminal gangs in Mexico have tentacles that reach into U.S. cities.
The return of the PRI, as the party is known because of its Spanish initials, amounted to an about-face for Mexico.
Mexicans fought for decades to topple the PRI from its 71-year grip on power, eventually ousting the party in 2000.
Some critics say a triumph of the PRI would lurch Mexico backward to its authoritarian past. Supporters say the PRI has learned from its past and wont rule as it once did, even if some within its ranks do not embrace the change.
The party would face opposition in Congress, a robust media, a largely independent Supreme Court and strengthened civil society groups that employ social media tools aggressively.
Many Mexicans feel frustration at the past 12 years of rule by the National Action Party, which failed to usher in wholesale reforms of a PRI-designed political system.
At the end, the lasting impression is of enormous wasted opportunity, Jorge Zepeda Patterson, a political scientist and columnist, wrote in the El Universal newspaper Sunday.
Under Calderon, the party brought U.S.-Mexico security cooperation to unprecedented levels. But while deploying soldiers to the streets, and capturing numerous drug barons, it failed to rein in runaway killings and rampant violence that have left pockets of the country under control of gangsters.
Calderon treats the toll from crime-related killings as a state secret, wary that the bloodletting will stain his legacy. Outside experts say they believe the toll has surpassed 55,000 deaths since late 2006.
In his victory speech, Pena Nieto pledged to maintain a firm hand against organized crime.
Let me be clear: There will be no agreement with, no respite against, organized crime, he said, adding that he will lead a new strategy to reduce violence and protect the lives of Mexicans, above all.
The election had the feel of a watershed as it redrew the political map.
In addition to the presidency, Mexicos 79.4 million voters also replaced all 128 senators and 500 members of the lower-house Chamber of Deputies, as well as more than 1,400 state and local officials.
Mexicans also voted for governors of six states and the mayor of Mexico City, a position with powers equal to a governor.
Voters gave a landslide victory to the Party of the Democratic Revolutions Miguel Angel Mancera, allowing the party to hang on to Mexico City Hall, which it has controlled for a decade and a half.
Mexico does not have a runoff system, and the presidential candidate who wins the most votes Sunday will take office Dec. 1 for a six-year term.
The one-time margin of some 30 percent that Pena Nieto held over his rivals a year ago diminished sharply during the three-month formal campaign. But the candidate, handsome and genial, drew swoons on the campaign trail, with women clasping at his forearms at campaign rallies, leaving red welts.
Whoever moves into Los Pinos, the presidential palace, Dec. 1, will find good and bad news on the security front. For the first time in years, the homicide rate is dipping. But the criminal landscape is unstable. Powerful criminal organizations, like Los Zetas and the Sinaloa Cartel, face an array of upstart crime groups.
Surprisingly, public security was not a major issue in the campaign. All candidates vowed to keep the army on the streets for the foreseeable future.