MEXICO CITY - President Andrés Manuel López Obrador’s party and its allies appeared poised to maintain their majority in Mexico's lower chamber of the congress, according to initial results.Only 47% of ballots had been counted late Sunday, but electoral authorities released "quick count" results based on voting samples that allow estimates of the voting trends to determine the rough potential makeup of the Chamber of Deputies.López Obrador's Morena party will have to rely on votes from its allies in the Workers Party and Green Party, but together they were expected to capture between 265 and 292 seats in the 500-seat chamber.