ARTICLE XI, Section 3(6) of the 1987 Constitution requires the concurrence of two-thirds of all the members of the Senate for conviction in an impeachment case.
At first glance, the rule appears simple. With 24 senators, conviction requires 16 votes. But constitutional provisions do not operate in a vacuum. What happens when some Senate seats are vacant? What if a senator dies, becomes permanently incapacitated, is legally disqualified from participating or must recuse because of a conflict of interest?
Some insist that the answer remains mathematically fixed: 16 votes, no matter how many senators are actually qualified and capable of participating. I do not agree with that rigid reading.
The phrase “all the Members” must be understood in the context of an actual impeachment proceeding. It should refer to all senators who are legally qualified and capable of participating in that proceeding, not to individuals who are dead, permanently incapacitated, disqualified from sitting or barred by a legally recognized conflict of interest.
Why should a senator who cannot lawfully participate be counted as though that senator had voted against conviction?
A vacancy is not a vote to acquit. Death is not a vote to acquit. Permanent incapacity is not a vote to acquit. Recusal, when required to preserve impartiality, is not a vote to acquit.
To count these nonparticipants in the denominator would effectively convert their inability to vote into a veto over conviction. The outcome would then depend not on the judgment of the senators who can legally hear and decide the case, but on accidental or external circumstances unrelated to the merits.
That cannot be the constitutional purpose of an impeachment proceeding.
The two-thirds requirement is designed to ensure that conviction is not achieved by a narrow or transient majority. It is a supermajority safeguard. It demands broad agreement before an impeachable official may be removed from office. But it is not reasonably understood as a mechanism for making conviction impossible whenever the Senate’s membership is reduced by circumstances that have nothing to do with the case.
The framers were designing an impeachment mechanism, not a mathematical trap.
They clearly intended a demanding threshold. The 1987 Constitution reduced the requirement from three-fourths under the 1935 Constitution to two-thirds. The commissioners also considered the danger that partisan control of the Senate could make conviction difficult or impossible. These discussions demonstrate an intention to protect against partisan removal, not to create an accidental veto for senators who cannot participate.
There is an important distinction between “all the Members” and “all the seats.”
The Constitution refers to members, not abstract seats. A vacant seat has no member occupying it. A senator who is permanently disqualified from participating in the impeachment court cannot be treated in the same way as a senator who is qualified, present and legally capable of judging the case.
The same principle applies to recusal. Recusal is not an act of opposition to conviction. It is a legal consequence of the duty to preserve impartiality and the integrity of the proceeding. If a senator must recuse because participation would create a conflict of interest, counting that senator as part of an unchanging denominator would punish the very act that constitutional fairness requires.
The more sensible approach is therefore to require two-thirds of all senators legally capable of participating in the impeachment proceeding.
This interpretation preserves the supermajority safeguard. It does not reduce the threshold to a simple majority. It does not permit conviction by a small faction. It merely ensures that the required supermajority is calculated from the body that can lawfully exercise the Senate’s impeachment power in the case before it.
Critics may argue that this approach invites manipulation. Could senators strategically recuse themselves or claim incapacity to lower the threshold? That concern is legitimate, but it does not justify treating every nonparticipant as a vote against conviction. The answer lies in clear rules, transparent findings and reviewable standards for determining whether a vacancy, disqualification, incapacity or recusal is legally valid.
A constitutional interpretation should not be rejected merely because it requires institutions to apply judgment. The Senate already exercises judgment when it determines its procedures, evaluates evidence, rules on questions of admissibility and decides whether an impeachable official should be convicted. The existence of possible abuse calls for safeguards, not for an interpretation that produces absurd or unjust results.
The Constitution’s language should not be read mechanically in a way that defeats the accountability mechanism it created. Where extraordinary circumstances arise, the Senate, as the body given the sole power to try and decide impeachment cases, must interpret the provision in a manner consistent with constitutional purpose, fairness and institutional functionality.
The question should be this: How many senators are legally capable of hearing and deciding the case?
That number should form the relevant universe from which the two-thirds requirement is calculated. Senators who cannot participate should not be treated as silent opponents of conviction. Their absence may affect the composition of the tribunal, but it should not automatically determine the outcome.
That does not mean that every vacancy or every recusal should reduce the threshold. The Senate must first identify the legal source of the nonparticipation and determine whether it is genuine, continuing and relevant to the proceeding. The calculation should be made before the final vote, announced publicly, and applied consistently and equally to both the prosecution and the defense.
The Senate should also state its reasoning before voting on the merits. Transparency would allow the public, the parties and reviewing institutions to understand why a senator was included or excluded from the calculation. It would discourage strategic maneuvering and preserve confidence in the result, whatever that result may be.
The two-thirds rule should remain.
But it should not become immunity through absence. A constitutional safeguard should protect fairness without allowing the accidental composition of the tribunal to defeat accountability altogether. The Constitution demands a supermajority of those legally able to decide, not an impossible majority manufactured by counting persons who cannot.
The author is a professor at the University of the Philippines Los Baños and vice chairman of the board of PTVNI.
