MEXICO CITY (Reuters) - Mexico's electoral court is poised to confirm President-elect Enrique Pena Nieto's victory in the July 1 ballot, despite allegations of vote buying and money laundering during the campaign, electoral officials and legal experts said. Leftist runner-up Andres Manuel Lopez Obrador, who lost the presidential election by 3.3 million votes, challenged the result, alleging that Pena Nieto's party used slush funds to buy votes and breached spending limits. ...