Mexico’s presidential campaign kicks off Left-wing candidate Andrés Manuel López Obrador has an 18-point advantage at the start of formal campaigning for the presidency Andrés Manuel López Obrador Former Mexico City mayor running for alliance led by National Regeneration Movement (MORENA) party Ricardo Anaya Candidate for National Action Party (PAN), leading left-right coalition, For Mexico in Front José Antonio Meade Former finance secretary running for coalition led by ruling Institutional Revolutionary Party (PRI) Margarita Zavala Wife of former President Felipe Calderon split from PAN to run as sole independent candidate SHARE OF OPINION POLL Parametria survey of 800 people between March 23-28. Margin of error ± 3.5 points Andrés Manuel López Obrador 38% MORENA / PT / PES Ricardo Anaya 20% PAN / PRD / MC José Antonio Meade 16% PRI, PVEM / NA Margarita Zavala 13% Sources: Reuters, Parametria Pictures: Associated Press © GRAPHIC NEWS