Exit Polls: Leftist to Win Mexico City Mayorship Mexico's main leftist party appears to have won big in the Mexico City mayor's race. Miguel Angel Mancera of the Democratic Revolution Party says exit polls favor his victory after voting in the capital ended Sunday. His closest challenger, Beatriz Paredes of the Institutional Revolutionary Party, says none of the exit polls favor her. The conservative National Action Party's candidate, Isabel Miranda de Wallace, has not commented on the voting. The PRD has struggled in the rest of Mexico, but it has held a lock on Mexico City since the mayorship became an elected position in 1997.