Ruling party candidate Felipe Calderon built an insurmountable lead in Mexico's presidential vote count on Thursday, but his leftist rival, Andres Manuel Lopez Obrador, vowed to challenge the results in court. With 99.56 percent of the vote counted, Felipe Calderon would win even if all the remaining votes went to Lopez Obrador, electoral officials said. Calderon won 35.82 percent of the vote, compared with 35.37 percent for Lopez Obrador. Calderon led supporters in a noisy party at the ruling National Action Party offices, and immediately called on his adversaries to forget a fiercely contested election that has put Mexico in a political crisis. “If the contest is behind us, our differences are behind us. Now is the hour for unity and agreements between Mexicans,” said Calderon, a pro-U.S. former energy minister.