In 2000, after 71 years, the PRI lost a presidential election to Vicente Fox of the opposition National Action Party (PAN). In the 2006 presidential election, Felipe Calderón from the PAN was declared the winner, with a very narrow margin (0.58%) over leftist politician Andrés Manuel López Obrador then the candidate of the Party of the Democratic Revolution (PRD). López Obrador, however, contested the election and pledged to create an "alternative government".