The Supreme Court has dismissed a petition asking it to rule on the validity of the contested June 3 Senate session, ending the first legal challenge to emerge from the chamber’s ongoing leadership row.
In a press briefer dated June 10, 2026, the Office of the Spokesperson said the Court En Banc dismissed the petition filed by John Barry Tayam for lack of legal standing. The Court ruled that Tayam failed to show he suffered, or was at imminent risk of suffering, any direct injury from the actions he challenged.
Tayam, a high school teacher, had asked the Court to declare that the presence of 12 senators during the June 3 session of the 20th Congress constituted a valid quorum. The case was docketed as G.R. No. E-06540, with Senate President Alan Peter Cayetano and Senators Pia Cayetano and Loren Legarda named as respondents.
The petition stemmed from a power struggle that paralyzed the Senate in early June. According to Rappler, the chamber was rendered inoperative after Cayetano and his allies, then the majority bloc, skipped consecutive plenary sessions on June 1 and 2. The impasse broke on June 3 when Senator Francis “Chiz” Escudero, previously aligned with Cayetano, joined the session, allowing a 12-member bloc to declare a quorum, vacate all leadership posts, and install Senator Sherwin Gatchalian as Senate President pro tempore.
Cayetano has rejected the proceedings as invalid, maintaining that at least 13 senators are required to elect a new Senate President. The Integrated Bar of the Philippines and a group of law deans and professors, however, said the 12-member quorum was lawful, citing the Court’s 1949 ruling in Avelino v. Cuenco — the only Supreme Court case addressing what constitutes a quorum in the Senate.
In his petition, Tayam invoked that same precedent. He told the Inquirer that no one was backing or sponsoring his filing, describing it as his duty to protect the Constitution and a way to end confusion over the Senate’s leadership so that legislative work could resume.
The Court said copies of the available pleadings may be downloaded from the Current Cases section of its website.
