Philippine legal experts debate Sara Duterte impeachment vote threshold

The potential impeachment of Philippine Vice President Sara Duterte has sparked a legal debate regarding the constitutional requirement for a two-thirds vote for conviction. Legal scholars and former jurists are divided on how to interpret the phrase “concurrence of two-thirds of all the Members of the Senate.”

Retired Supreme Court Associate Justice Antonio Carpio argues that the denominator for this calculation should only include senators currently eligible to serve. He suggests that only 21 senators may be qualified to vote, noting that lawmakers who are detained, suspended due to anti-graft or anti-plunder charges, or who have failed to take the necessary oath cannot be counted toward the total membership.

Specifically, Carpio identified Senator Rodante Marcoleta and Senator Jinggoy Estrada as potentially disqualified due to legal proceedings, and Senator Bato due to a failure to take the required oath. Conversely, some interpretations of the 1987 Constitution suggest the threshold should be based on the full 24-member Senate, requiring at least 16 votes for conviction, regardless of absences or individual eligibility.