Jinggoy Ejercito Estrada served as mayor of San Juan from 1992 to 2001, during which he oversaw numerous infrastructure projects. He was then elected senator in 2004. In 2013, Estrada was accused in the pork barrel scam of pocketing PHP 183 million in kickbacks from fake projects along with Senators Juan Ponce Enrile and Bong Revilla. While acquitted of plunder, Estrada faced other legal issues related to the scam and was suspended from the Senate in 2014. He unsuccessfully ran for reelection to the Senate in 2019 but regained his Senate seat in 2022.