Mexico’s highest electoral court has formally received the legal challenges filed by the second-place leftist candidate seeking to annul the July 1 presidential elections. The challenges filed by leftist candidate Andres Manuel Lopez Obrador appear to face an uphill struggle given the 6.6.-percent margin of victory for the winner of the race, Enrique Pena Nieto. Lopez Obrador claims Pena Nieto’s campaign engaged in overspending and vote buying. The court says he submitted 58 boxes of evidence as part of the challenge.