The Pwersa ng Masang Pilipino (), formerly Partido ng Masang Pilipino (), is a populist political party in the Philippines. It is the political party of former Philippine President Joseph E. Estrada. In the May 1998 presidential election, it aligned itself with other political parties to form the Laban ng Makabayang Masang Pilipino (Struggle of the Patriotic Filipino Masses). History Originally named the Partido ng Masang Pilipino, the Pwersa ng Masang Pilipino emanated from an organization which was an offshoot of the Economic Recovery Action Program (ERAP) organized by George S. Antonio in May 1990. The ERAP organization was formally launched on October 4, 1990 with 21 original members. The organization grew exponentially with the recruitment of members nationwide. It was then that the PMP was accredited as a political party with the objective of helping to uplift the lives of the Filipino people, especially the poor and the disadvantaged, through effective and efficient social and economic reforms. Its first campaign headquarters was located at the 4th floor of San Buena Building, EDSA corner Shaw Boulevard, Mandaluyong. On August 20, 1991, PMP was formally accredited as a national political party. In 1992, PMP took its first major political step by fielding then-Senator Joseph Estrada as its vice-presidential candidate together with other local candidates. Estrada became the running mate of Eduardo "Danding" Cojuangco Jr., the standard-bearer of the Nationalist People's Coalition (NPC). Estrada overwhelmingly won the vice-presidency, defeating former Chief Justice Marcelo Fernan of the Laban ng Demokratikong Pilipino along with five other candidates. In 1997, a permanent and fully operational headquarters was established at 409 Shaw Boulevard in Mandaluyong. In the 1998 Philippine general election, PMP was very much involved in the election with the candidacy of Estrada as president and other local candidates nationwide. PMP played a lead role in the establishment of the opposition coalition Laban ng Makabayang Masang Pilipino (LAMMP), which also counted among its members the LDP and NPC. The coalition fielded full slates for the national and local levels. Card-bearing members reached as high as 3.2 million nationwide. Estrada won the presidential election, garnering almost 11 million votes and defeating nine other candidates including House Speaker Jose de Venecia Jr. of Lakas–NUCD–UMDP. In 2001, PMP led the opposition coalition, fielding senatorial candidates from People's Reform Party and LDP as well as independent candidates. The Puwersa ng Masa coalition won four seats in the Senate, including