Mexico\'s national election authority on Wednesday announced a review of ballots at 54.5 percent of the polling stations in the country\'s weekend presidential election. Edmundo Jacobo, a top official with the Federal Electoral Institute (IFE), made the announcement one day after leftist candidate Andres Manuel Lopez Obrador, who came in second in the presidential race Sunday, demanded a full vote recount, claiming that the results were \"fraudulent.\"