PH Supreme Court throws out three petitions vs. impeachment lower voting threshold

The Supreme Court of the Philippines (SC) has thrown out three separate petitions challenging the Senate impeachment court’s controversial decision to lower the vote threshold required to convict Vice President Sara Duterte.

In a press briefer issued on Wednesday (September 30, 2026) following its full En Banc session, the High Tribunal confirmed the dismissal of the petitions filed by:

• former Executive Secretary Victor D. Rodriguez (G.R. No. E-08529),

• Atty. Berteni Cataluña Causing (G.R. No. E-00729), and

• Atty. Ernesto B. Francisco, Jr. (G.R. No. E-08543).

The SC cited procedural grounds, including lack of standing and prematurity, in dismissing the filings. Legal arguments dismissed by the SC

The dismissed petitions before the High Tribunal had argued that the Senate improperly altered constitutional mandates.

Rodriguez argued that the Senate effectively amended the Constitution without going through the required constitutional process, seeking a temporary restraining order (TRO). In the press briefer, the SC said Rodriguez claimed that the Senate "amended the Constitution "by adding a qualification not found i n its text. He asked the SC tonullify the ruling and declare that any change to Article XI, Section 3(6) must go through the constitutional process for amendment or revision.

Causing asserted that all sitting senators must be factored into the vote regardless of detention, medical condition, or absence.

He asked for a status quo ante order (SQAO) and a directive compelling Senators Jose "Jinggoy" Estrada Jr., Rodante Marcoleta, and Ronald "Bato" dela Rosa to participate.

Francisco, Jr. maintained that the 24-member constitutional makeup requires a fixed 16-vote minimum for conviction at all times.

The Senate ruling on conviction votes

The legal battle stems from a recent ruling by the Senate, sitting as an Impeachment Court, which determined that the constitutional requirement for a two-thirds majority under Article XI, Section 3(6) applies strictly to senators who are legally and actually able to participate in the trial at the time of the vote.

Under standard operations with all 24 elected members present, a conviction would require 16 votes.

However, as Reuters reported on September 23, 2026 the Philippine Senate, sitting as an impeachment court, lowered the number of votes needed to convict Duterte, reducing the threshold prosecutors must clear to secure a guilty verdict.

The court ruled that only senator-judges that are able to participate in the trial should be counted when determining the threshold for conviction. Four of the 24 senator-judges have been unable to participate in the proceedings and cannot vote.

The constitution requires a two-thirds vote to convict an impeached official, so the decision means prosecutors now need 14 votes instead of 16 togain a conviction. The decision could have broader implications if more senator-judges become unable to participate in the proceedings.

Thirteen lawmakers voted in favour of the ruling, while six, most of whom are seen as allies of Duterte, did not participate in the proceedings. One senator voted against lowering the vote threshold.

Four senators have been unable to take part in Duterte's impeachment trial due to legal actions against some, which include a scandal in a multi-billion-dollar public works programme and the International Criminal Court's investigation into a bloody "war on drugs" led by Duterte's father, former President Rodrigo Duterte.

High stakes for the 2028 Presidential Race

The procedural victory for prosecution forces significantly alters the dynamic of the high-profile trial, which represents the climax of a bitter political fallout between the Vice President and President Ferdinand Marcos Jr.

While the two swept to power in a landslide victory in 2022 under the "UniTeam" alliance, their partnership has since disintegrated over bitter disputes regarding budget allocations, policy directions, and congressional power dynamics.

Duterte, who is widely viewed as a frontrunner for the 2028 presidential race, faces accusations of misusing public funds, accumulating unexplained wealth, and issuing life threats against President Marcos, First Lady Liza Araneta-Marcos, and former Speaker Martin Romualdez.

She has consistently denied all wrongdoing, while also facing separate criminal charges for grave threats for which she is currently out on bail.

A conviction by the Senate Impeachment Court would carry an automatic disqualification from holding public office, effectively removing her from the 2028 presidential race.

-Paraluman News with Reuters