Mexico's TEPJF electoral court has rejected the request made by the leftist Progressive Movement coalition for a special audit of the results of the July 1 presidential election.
The coalition's request falls outside the court's "legal functions and purview," the TEPFJ said in a statement.
The Progressive Movement has demanded that the results of the presidential election, which was won by the Institutional Revolutionary Party, or PRI, be thrown out, alleging that the winning alliance exceeded campaign spending limits and engaged in vote-buying with funds obtained from illicit sources.
PRI candidate Enrique Peña Nieto won the presidential election with 38.21 percent of the vote, while leftist candidate Andres Manuel Lopez Obrador took second place with 31.59 percent, according to the final official results released by the Federal Electoral Institute, or IFE.
The TEPJF cannot force the IFE, Mexico's highest elections agency, to take an action whose purpose "is to create a special audit procedure or simply to resolve administrative proceedings in a summary manner," Magistrate Pedro Esteban Penagos said.
The case should first be submitted to the IFE, with the plaintiffs then having the option to appeal the election agency's ruling to the tribunal, the TEPJF said.
Magistrate Manuel Gonzalez Oropeza, for his part, said the legal argument for the leftist coalition's case lacked proof because there had not been a denial of justice as alleged in the filing.
Magistrate Constancio Carrasco, however, said the TEPJF would be able to request information from the IFE about complaints regarding vote counts during the trial on declaring the election results invalid.
The TEPJF also ruled that physical and legal persons presenting "friend of the court" briefs in the trial requested by the Progressive Movement "lack a legitimate interest in the matter."
Briefs presented by media companies and grassroots organizations do not reflect an interest contrary to that of those seeking the election's invalidation and cannot be "friends of the court," Chief Magistrate Jose Alejandro Luna Ramos said.
The Mexican left is trying to dig up evidence of irregularities during last month's presidential election, organizing nearly 150 people's assemblies.
"These assemblies have the purpose of informing all citizens about what we are doing to get the electoral tribunal to invalidate the presidential election," Lopez Obrador told supporters Sunday in Nezahualcóytl, a city in Mexico state.
The politician, who was the candidate of a coalition of leftist parties led by the Party of the Democratic Revolution, or PRD, plans to hold an "Expofraude" on Aug. 12 at which evidence of election irregularities will be presented to the public.
The PRD and the conservative National Action Party, or PAN, announced last month that they planned to jointly file a complaint with the Attorney General's Office on alleged money laundering by the PRI.
The two parties also filed a request with the IFE for a speedy investigation of allegations of irregular use of campaign funds by the PRI, which governed Mexico from 1929 to 2000.
The TEPJF has until Aug. 31 to issue a ruling on the challenge filed by Lopez Obrador's Progressive Movement coalition, either certifying Peña Nieto the winner or calling for a new vote. EFE