Q: In this task, you are given a text of many news articles seperated by special token "|||||". Your task is to summarize them.
Mass Mexico City protest against Pena Nieto win 
  
 MEXICO CITY — Tens of thousands of demonstrators marched through Mexico City against the presidential election win of Enrique Pena Nieto, accusing him and his party of widespread vote-buying. 
  
 The marchers claim Pena Nieto, from the Institutional Revolutionary Party (PRI), "bought" his way to victory by handing out gift cards and securing paid favorable media coverage from the country's two main TV networks. 
  
 "Get out Pena, Mexico without the PRI!" the protesters chanted as the massive crowd made its way down the Paseo de la Reforma -- a main thoroughfare in the capital -- to the Zocalo, the city's giant downtown square. 
  
 Mexico's independent election authority on Friday ratified Pena Nieto's victory in the July 1 vote, saying he bested his nearest opponent, leftist Andres Manuel Lopez Obrador, by nearly seven percentage points. 
  
 But many in this country of 112 million have refused to accept Pena Nieto's victory, which marks the return to power of the PRI, the party that ruled Mexico for seven decades until 2000, amid accusations of rigged elections and repression. 
  
 "We would look really bad if Pena Nieto would take office and we did nothing," said Mara Soto, a 21 year-old student at the National Autonomous University of Mexico (UNAM). 
  
 Lopez Obrador, from the Party of the Democratic Revolution (PRD), also came in second in the 2006 presidential election, that time by the slimmest of margins -- less than one percentage point. 
  
 He led protests that virtually paralyzed Mexico City for more than a month, claiming fraud in the contest in which outgoing President Felipe Calderon was elected. 
  
 Lopez Obrador however has said he was not behind Saturday's march, which participants said was organized online via Facebook, Twitter and activist blogs. Students of the #YoSoy133 protest movement also said they did not organize the demonstration. 
  
 Pena Nieto, 45, is set to take office in December. He inherits a country engaged in a brutal drug war and an economy struggling to create jobs. Nearly half of all Mexicans are poor, according to government figures. 
  
 Most of the marchers on Saturday appeared to be in their 20s, but families with young children and plenty of middle-aged protesters also attended. 
  
 "I'm not young, but I'm with you!" cried out Noe Santillan Ortiz, 50, who addressed the crowd from the base of the Angel of Independence monument, where the march began. 
  
 He then screamed himself hoarse leading expletive-laden anti-PRI chants. The crowd followed and roared with approval. 
  
 Much of the anger was directed at Televisa, the largest media conglomerate in the Spanish-speaking world, and the smaller TV Azteca. 
  
 According to a March survey by Defoe consultants, 90 percent of Mexicans get their news from TV -- which, outside of cable TV, the two networks dominate. 
  
 Pena Nieto's wife, Angelica Rivera, was a Televisa soap opera diva and star of telenovelas that include the 2007 hit "Distilling Love." 
  
 Critics point to documents leaked to local and foreign media alleging that Pena Nieto paid Televisa for years of glowing coverage. Both Pena Nieto and Televisa deny the charges. 
  
 Plenty of anger was also directed at Soriana, Mexico's giant supermarket chain. 
  
 Pena Nieto "took advantage of the need of poor people to buy votes," said Gabriel Mendoza, a 54 year-old carpenter, pointing to a yellow Soriana gift card allegedly handed out by the PRI. The card had the logo of a pro-PRI union. 
  
 Immediately after the vote, Soriana supermarkets were swamped with people armed with yellow gift cards they said came from the PRI, fearful that the cards would be canceled after the election. 
  
 The PRI insists it ran a clean election, and Soriana said the cards with union logos are part of a special buyer's program. At least one PRI governor said the cards were part of a state program to help school children. 
  
 On Saturday Lopez Obrador -- who said he will contest the results legally and peacefully -- urged authorities to investigate the vote buying charges, and called on Calderon's conservative National Action Party (PAN) to join efforts to prove that the PRI broke campaign spending limits. 
  
 Octavio Aguilar, a senior campaign official for failed PAN presidential candidate Josefina Vazquez Mota, told AFP Friday that he estimates that the PRI spent up to $500 million on the campaign, far beyond the legal limit of $30 million. 
  
 "This isn't going to stay like this," threatened Humberto Sanchez, 19. "There will be more marches." 
  
 Copyright © 2012 AFP. All rights reserved. More » ||||| Tens of thousands of people marched in Mexico's capital on Saturday to protest Enrique Pena Nieto's apparent win in the country's presidential election, accusing his long ruling party of buying votes. 
  
 Demonstrators gather to protest the official results of the presidential election in Mexico City, Saturday, July 7, 2012. Mexicans marched in rejection of the final vote count in the presidential race... (Associated Press) 
  
 Wearng a Guy Fawkes mask, a Mexican unhappy with the presidential election results, holds a banner that reads in Spanish; "No to another fraud!," during a march in Mexico City, Saturday, July 7, 2012.... (Associated Press) 
  
 Mexicans unhappy with the presidential election results, march along Avenida Reforma on their way to the Zocala or Main Plaza, in Mexico City, Saturday, July 7, 2012. The protestors are marching in rejection... (Associated Press) 
  
 Mexicans unhappy with the presidential election results gather around the Angel of Independence monument, in Mexico City, Saturday, July 7, 2012. The protestors marched in rejection of the final count... (Associated Press) 
  
 Demonstrators shout slogans as they gather at the Zocalo Plaza in Mexico City, Saturday, July 7, 2012. Tens of thousands marched in rejection of the final count in the presidential election showing former... (Associated Press) 
  
 A man holds a defaced image of President-elect Enrique Pena Nieto as Mexicans unhappy with the presidential election results prepare for a march, in Mexico City, Saturday, July 7, 2012. The protestors... (Associated Press) 
  
 A woman waves a national flag as Mexicans unhappy with the presidential election results, march along Avenida Reforma on their way to the Zocala or Main Plaza, in Mexico City, Saturday, July 7, 2012.... (Associated Press) 
  
 Mexicans unhappy with the presidential election results gather around the Angel of Independence monument, in Mexico City, Saturday, July 7, 2012. The protestors are marching in rejection of the final... (Associated Press) 
  
 A sign that reads in Spanish; "No more PRI, not one step back," hangs from a statue placed there by demonstrators in Mexico City, Saturday, July 7, 2012. The protestors are marching in rejection of the... (Associated Press) 
  
 Demonstrators shout slogans as they gather at the Zocalo Plaza in Mexico City, Saturday, July 7, 2012. Tens of thousands marched in rejection of the final count in the presidential election showing former... (Associated Press) 
  
 The protesters were angered by allegations that Pena Nieto's Institutional Revolutionary Party gave out bags of groceries, pre-paid gift cards and other goods to voters ahead of July 1 national elections. 
  
 The students, unionists and leftists in the march carried signs reading, "Pena, how much did it cost to become president?" and "Mexico, you pawned your future for 500 pesos." Mexico City officials put the size of the crowd that reached its central Zocalo plaza at 50,000. 
  
 "The fraud was carried out before (the election), buying votes, tricking the people," said Gabriel Petatan Garcia, a geography student who carried a sign in Finnish. 
  
 Protesters also carried signs in English, Japanese, French, German and other languages to call the attention of the international press. 
  
 Pena Nieto, a youthful, 45-year-old married to a soap opera star, won last Sunday's election by 6.6 percentage points, according to the official count, bringing the PRI back to power after 12 years in opposition. The party had ruled Mexico for 71 consecutive years, with what critics say was the help of corruption, patronage and vote fraud. 
  
 PRI officials deny the vote-buying charge and say the vote was free and fair. 
  
 The final vote count had Pena Nieto getting 38.21 percent support, leftist Andres Manuel Lopez Obrador of the Democratic Revolution Party with 31.59 percent, and Josefina Vazquez Mota of the conservative National Action Party with 25.41. The small New Alliance Party got 2.29 percent. 
  
 The final vote count must be certified in September by the Federal Electoral Tribunal. The tribunal has declined to overturn previously contested elections, including a 2006 presidential vote that was far closer than last Sunday's. 
  
 Accusations of vote-buying began surfacing in June, but sharpened later when people rushed to grocery stores on the outskirts of Mexico City to redeem pre-paid gift cards worth about 100 pesos ($7.50). Many said they got the cards from PRI supporters before the elections. 
  
 Lopez Obrador said millions of voters had received either pre-paid cards, cash, groceries, construction materials or appliances. 
  
 Some marchers covered the heads of statues with plastic shopping bags from Soriana _ the supermarket chain where the gift cards were redeemable _ to underline their protest. 
  
 "We have to come out in the streets to denounce that the PRI bought votes, and there were people who sold them," said 32-year-old psychologist Raquel Ruiz. 
  
 Some protesters felt that overturning the election result would be difficult at this point, while others thought there were judicial means to still prevent Pena Nieto from assuming the presidency. 
  
 Lopez Obrador said he will file a formal legal challenge to the vote count in electoral courts in the coming days based on the allegation that PRI vote-buying illegally tilted millions of votes. 
  
 Simply giving away such gifts is not illegal under Mexican electoral law, as long as the expense is reported to electoral authorities. Giving gifts to influence votes is a crime, though is not generally viewed as grounds for overturning an election. 
  
 Leonardo Valdes, the president of the Federal Electoral Institute, has said he doesn't see any grounds for overturning the results but that an investigation into the gift cards had been launched. 
  
 PRI spokesman Eduardo Sanchez said earlier this week that the gift-card event had been "a theatrical representation" mounted by the left. Sanchez claimed supporters of Lopez Obrador took hundreds of people to the stores, dressed them in PRI T-shirts, gave them gift cards, emptied store shelves to create an appearance of panic buying, and brought TV cameras in to create the false impression that the PRI had given out the cards. 
  
 Cesar Yanez, the spokesman for Lopez Obrador's campaign, denied the PRI accusation. |||||
A:
Upwards of 50,000 students, leftists, and unionists took to the streets in Mexico City yesterday, protesting last week's presidential election win by Enrique Peña Nieto and the resurgent Institutional Revolutionary Party, reports the AFP. Protesters, mostly young people, accused the PRI of buying the election through favorable TV coverage and gift cards slipped to poor people. "Get out Peña, Mexico without the PRI!" chanted protesters as they marched through the center of the city. Andres Manuel Lopez Obrador, who placed second both last week and six years ago, said he was not behind the protests, though he led paralyzing protests in the wake of 2006's election. Protesters carried signs that read "Peña, how much did it cost to become president?" and "Mexico, you pawned your future for 500 pesos." Giving away gifts is not illegal under Mexican election law, as long as the expense is reported and the gifts are not given to influence votes, notes the AP. "This isn't going to stay like this," says a protester. "There will be more marches."