Answer
Estrada lost to Benigno Aquino III in the 2010 Presidential Elections. Estrada was the incumbent president at the time, and he was running for re-election. Aquino was the son of former president Corazon Aquino, who had been assassinated in 1989. Aquino campaigned on a platform of good governance and transparency, and he promised to clean up the corruption that had plagued the Estrada administration.