Historical issues on succession and citizenship

The Senate of the 20th Congress has proven to be a drama-filled Congress in Philippine history. Of course, the current Senate remains second only to the Second Congress (1950–1953), where five different individuals held the Senate, beginning with Mariano Jesus Cuenco (December 30, 1949–March 5, 1952), Quintin Paredes (March 5, 1952–April 17, 1952), Camilo Osias (April 17, 1952–April 30, 1952), Eulogio Rodriguez (April 30, 1952–April 17, 1953), Camilo Osias (April 17, 1953–April 30, 1953), Jose Zulueta (April 30, 1953–May 20, 1953), and Eulogio Rodriguez (May 20, 1953–December 8, 1953). To date, questions still linger as to who the real and legal Senate president is of the 20th congress.

We have had no less than four presidents leading the chamber since it convened on July 28, 2025. Senator Francis “Chiz” Escudero, the incumbent president, was replaced by Senator Vicente “Tito” Sotto III on September 8, 2025, who himself was ousted on May 11, 2026 by Senator Alan Peter Cayetano. Recently, albeit still disputed, Cayetano was replaced by Senator Sherwin Gatchalian on June 3, 2026.

Senator Gatchalian’s genealogy is quite interesting. He is just the ninth Senate president born within the greater Metro Manila area. Secondly, he is also just the second to assume the position as a bachelor, the first one being Manuel L. Quezon (who later married his cousin Aurora Aragon in 1918). But it is his Chinese lineage that makes him even more intriguing.

Using genealogical ancestral computation, he is the first Senate president with an almost 93.75% Chinese and just 6.25% Filipino ancestry. His great-great-grandfather, Pablo Pacheco, was a pure Chinese who married Filipina Marciana Gatchalian. Their son, Santiago Gatchalian, married a pure Chinese in China, Chu Gim Tee, and their son, Francisco Gatchalian, married another pure Chinese, also in China, Ong Chiu Kiok, while their son William Gatchalian married yet another pure Chinese by the name of Ting Dee Hua. Their children Senator Sherwin Gatchalian, Valenzuela 1st District representative Kenneth Gatchalian, DSWD Secretary Rex Gatchalian, and Valenzuela Mayor Wes Gatchalian, are all almost pure Chinese, genealogically speaking.

It is also this Chinese connection that makes Senator Gatchalian just the second Senate president whose citizenship was ever in doubt. The first was Juan Ponce Enrile. During the 1987 senatorial elections, opponents questioned his citizenship, arguing that his father was Spanish and that, because he was born out of wedlock and only later recognized by his father, there were doubts about his natural-born Filipino status under the 1935 Constitution. He later served as Senate president from 2008 to 2013.

Senator Gatchalian's paternal lineage has faced citizenship questions since 1961, when his father, William Gatchalian, was recognized as a Filipino citizen through his grandfather Santiago's maternal line. The decision was reversed a year later, triggering decades of legal disputes. The issue resurfaced in 1990 when the government sought his deportation and questioned the validity of his ancestors' marriages in China. The controversy ended with the landmark 1991 Supreme Court ruling in Board of Commissioners v. Dela Rosa, which upheld his citizenship and effectively settled the family's nationality status.

A decade later, in 2001, during Sherwin Gatchalian’s first political foray as a legislator, a complaint was filed against him questioning his citizenship once more, alleging that he “was not a natural-born Filipino as his parents had been admitted in the country “without any documentary evidence to show that either is a Filipino citizen.” However, he won as representative for Valenzuela’s 1st District in 2001 and later went on to serve in various political positions, until ending as the current Senate president.

Whether the current Senate will once again reshuffle its leadership and eventually eclipse the Second Congress's record of five Senate presidents remains an open question. History has a habit of repeating itself, and the Philippine Senate has often proven to be one of its favorite stages. As improbable as it may seem elsewhere, such developments are never entirely beyond possibility in the Philippines.