10/06/2026
LEGAL ARTICLE: LEGALITY OF SENATE PRESIDENCY – CAYETANO REMAINS THE LEGITIMATE HEAD; GATCHALIAN AND HIS BATCH FACE CRIMINAL LIABILITY✨
Subject: Unconstitutionality of the June 3, 2026 Leadership Change, Criminal Accountability of the 12-Senator Faction, and Legal Status of Key Members Legal Bases: 1987 Philippine Constitution, Senate Rules, Rules of Court, Revised Penal Code (Articles 177, 143, 144, 148, 150), Anti-Plunder Act, Anti-Graft and Corrupt Practices Act, International Criminal Court Statute, and Established Jurisprudence
I. INTRODUCTION
On May 11, 2026, Senator Alan Peter Cayetano was formally elected Senate President, receiving the support of 13 out of 24 Senators. This number is critical — it is exactly the majority of all members required by the 1987 Philippine Constitution. His election was done openly, properly, and in full compliance with the law, making his position secure and legally binding from day one.
Just three weeks later, on June 3, 2026, a group of only 12 Senators gathered for a session that was not properly called, lacked the required number of members to make decisions, and completely ignored the constitutional rules. During this gathering, they claimed the position of Senate President was vacant and declared Senator Sherwin Gatchalian as their “Acting Senate President.” This claim was later posted on the Senate website and acknowledged by some offices in Malacañang — but as we will explain, administrative recognition cannot fix a violation of the Constitution.
This article clearly lays out, using the exact words of the law and Supreme Court rulings, that Senator Alan Peter Cayetano is still the one and only lawful Senate President. The move to replace him was legally non-existent — or void ab initio — because it failed to meet the mandatory requirement of votes from the majority of all senators, and was held without a valid quorum. Importantly, the true constitutional majority of 13 Senators supporting Cayetano is numerically and legally intact — the apparent reduction in attendance during the June 3 session was caused by the legal inability and physical absence of two key members of his bloc, who are currently facing serious criminal charges and international arrest warrants, and thus could not attend to support their legitimate leader.
More seriously, we will show that Senator Gatchalian and the 12 senators who joined him are not just acting illegally — nonexistent — or void ab initio — because it failed to meet the mandatory requirement of a majority of all senators they have committed crimes under the Revised Penal Code. Their actions amount to taking power that does not belong to them, disrupting the work of the Senate, and falsely claiming they represent the majority when they do not. The 13 senators supporting Cayetano are the true, constitutional majority; the 12-member group is a minority faction whose decisions cannot bind the Senate or the Filipino people.
II. RELEVANT LEGAL AND CONSTITUTIONAL PROVISIONS
A. 1987 PHILIPPINE CONSTITUTION
1. Article VI, Section 16 (1) — NON-NEGOTIABLE RULE
“The Senate shall elect its President and the House of Representatives its Speaker, by a majority vote of all its respective Members. Each House shall choose such other officers as it may deem necessary.”
This is one of the clearest and most important rules in our Constitution. The phrase “by a majority vote of all its respective Members” was written specifically into the 1987 text — a major change from the old 1935 Constitution — precisely to stop exactly what happened here: a small group trying to take over leadership just because they showed up, while the rest stayed away or were legally prevented from attending. The people who wrote our Constitution explicitly rejected the old rule that said “whoever is present decides.”
Here is what this means in plain numbers:
Total number of Senators: 24
Majority of all members: 13 votes (not 12, not 11 — exactly 13)
Cayetano’s votes: 13 → VALID and LEGAL
Gatchalian’s votes: 12 → INVALID and UNCONSTITUTIONAL
Every single seat in the Senate counts — whether the senator is present, absent, detained, or a fugitive from justice. Legal status or physical inability to attend does not erase membership or reduce the number of votes needed.
2. Article VI, Section 16 (2) — QUORUM: THE MINIMUM NUMBER NEEDED TO ACT
“A majority of each House shall constitute a quorum to do business; but a smaller number may adjourn from day to day, and may be authorized to compel the attendance of absent members, in such manner and under such penalties as each House may provide.”
“Majority of each House” means majority of all members — 13 out of 24.
On June 3, 2026: only 12 senators were present
12 is exactly half — NOT a majority.
THERE WAS NO QUORUM.
Under the law, no quorum means no legal session, no valid decisions, and no binding actions. Anything done in that meeting is as if it never happened at all. Crucially, two members of the legitimate 13-senator majority were absent not by choice, but due to active criminal processes and arrest warrants, meaning their absence was involuntary and cannot be used against the lawful majority.
3. Separation of Powers & Legislative Autonomy
While the Senate has the right to make its own rules, those rules cannot go against the Constitution. The Constitution is the highest law of the land — no internal rule, custom, or practice can change or ignore what it clearly says.
B. RULES OF THE SENATE
1. Rule II, Section 2
“The officers of the Senate shall be elected by the majority vote of all its members.”
This rule simply repeats the Constitution. It does not say “majority of those who attended” or “majority of those available.” It says all members. No shortcut is allowed.
2. Rule III, Section 1
“The Senate President shall hold his office at the pleasure of the Senate, and may be removed or replaced only in accordance with these Rules.”
When the rule says “at the pleasure of the Senate,” it means at the pleasure of the Senate as a whole — the constitutional majority of 13 members, not a small group that happens to gather.Also, a basic rule of fairness and law: you cannot remove an officer with fewer votes than it took to elect him. If 13 votes were needed to put him in office, 13 votes are needed to take him out.
3. Rule XII — Sessions and Quorum
“A session is valid only if a quorum is present. Without a quorum, no business may be transacted.”
This confirms: No quorum → No valid session → No valid election or resolution.
C. RULES OF COURT (Rule 129, Section 3) — HOW WE READ THE LAW
“In the construction of a statute, the court shall pursue the intent of the legislature. When the language of the law is clear and unambiguous, it must be taken in its plain, ordinary, and commonly accepted meaning.”
unambiguous
Our Constitution is clear: “majority vote of all its respective Members.” There is no hidden meaning, no room for guesswork. We simply follow what it says.
D. REVISED PENAL CODE — CRIMES COMMITTED & PENALTIES
What the Gatchalian group did is not just a legal mistake — it is a crime. Below are the exact provisions they violated, along with the penalties they face:
🔹 ARTICLE 177 — USURPATION OF AUTHORITY OR OFFICIAL FUNCTIONS
“Any person who shall knowingly and falsely represent himself to be an officer, agent or representative of any department or agency of the Philippine Government... or who, under pretense of official position, shall perform any act pertaining to any person in authority or public officer... without being lawfully entitled to do so, shall suffer the penalty of prision correccional in its minimum and medium periods (6 months and 1 day to 4 years and 2 months imprisonment) and perpetual special disqualification from holding public office.”
Who is liable:
Senator Sherwin Gatchalian: He claimed to be Senate President, sat in the chair, presided over sessions, signed documents, and gave orders — even though he had no legal right to the position.
All 12 Senators who joined and supported him: They helped organize the illegal meeting, recognized him as leader, and acted as if their group was the real Senate. Under the law, they are co-principals — equally guilty.
Key point: Even if you are a public official, if you take or use powers that do not belong to you, you commit this crime.
🔹 ARTICLE 143 — ACTS TENDING TO PREVENT THE MEETING OF CONGRESS
“Any person who, by force, fraud, intimidation, or by any other unlawful means, shall prevent or attempt to prevent the meeting of the Congress or of any of its committees, or shall disturb or interrupt the proceedings thereof, shall suffer the penalty of prision correccional in its medium and maximum periods (2 years and 4 months to 6 years imprisonment) and fine not exceeding ₱6,000.”
Why it applies: They held an illegal meeting, claimed to be the Senate leadership, and tried to take over the institution — directly disrupting and replacing the lawful proceedings led by the legitimate Senate President.
🔹 ARTICLE 144 — DISTURBANCE OF PROCEEDINGS
“The penalty of arresto mayor (1 month to 6 months) shall be imposed upon any person who, without authority of law, shall disturb or interrupt the proceedings of the Congress or of any of its committees.”
Their actions split the Senate, created confusion, and stopped the Senate from doing its work properly — exactly what this law forbids.
🔹 ARTICLE 148 — UNLAWFUL ASSEMBLY
“The penalty of prision correccional in its minimum period (6 months – 2 years) shall be imposed upon the leaders and organizers of any meeting attended by more than three persons, where the purpose is to commit any crime or to employ force or threats for the purpose of usurping powers of government.”
Why it applies: The June 3 meeting was attended by 12 senators, and their clear goal was to take power that did not belong to them. This fits the definition of an unlawful assembly.
🔹 ARTICLE 150 — USURPATION OF LEGISLATIVE POWERS
“Any person who, not being a member of the Congress, or being a member but not authorized by law, shall assume or exercise any power or function pertaining to the Congress or to any of its members or officers, shall suffer prision correccional (6 months – 4 years) and absolute disqualification.”
Why it applies: Only the Senate as a whole — acting through its constitutional majority of 13 — has the power to elect leaders or reorganize itself. The 12 senators took that power for themselves, without legal authority.
III. CRITICAL FACTUAL CONTEXT: LEGAL STATUS & INABILITY TO ATTEND OF KEY MAJORITY MEMBERS
A vital fact ignored by the Gatchalian faction is that the 13-senator majority supporting Cayetano remains fully intact and legally recognized. The reason only 11 of them were physically present on June 3, 2026, is that two members are currently facing active criminal charges and international arrest warrants, making it legally or physically impossible for them to attend and support their leader. Their absence was involuntary and compelled by law, not a voluntary boycott or abandonment of their bloc.
📌 SENATOR JINGGOY ESTRADA: DETAINED & FACING NON-BAILABLE CRIMES
Senator Jinggoy Estrada, a solid member of the Cayetano majority, could not attend the session because he is currently under detention and facing serious criminal charges filed by the government itself.
Charges Filed: The National Bureau of Investigation (NBI) filed Plunder (non-bailable) and Graft charges against him in connection with alleged multi-million-peso kickbacks and anomalies involving government flood control projects.
Court Action: The Sandiganbayan (anti-graft court) issued arrest warrants for both cases. For Plunder, no bail is allowed; for Graft, bail was set at ₱90,000.
Current Status: Senator Estrada voluntarily surrendered to the PNP-CIDG and is currently booked and detained at the New Quezon City Jail.
Legal Effect: Being in lawful custody and under judicial process, he is legally barred from leaving detention or attending Senate sessions. His absence is not a choice — it is a legal impossibility. He remains a member of the Senate and a committed part of the 13-senator majority, but physically cannot be present.
📌 SENATOR RONALD "BATO" DELA ROSA: FUGITIVE FROM JUSTICE WITH ACTIVE ICC WARRANT
Senator Ronald "Bato" Dela Rosa, another loyal member of the Cayetano bloc, could not attend because he is currently a fugitive from justice evading an active international arrest warrant.
ICC Warrant Issuance: On November 6, 2025, the International Criminal Court (ICC) Pre-Trial Chamber issued a confidential warrant of arrest against him for Crimes Against Humanity (Murder) as a co-perpetrator during the government’s "war on drugs." This warrant was formally unsealed and made public on May 11, 2026.
Local Legal Battles: He sought a Temporary Restraining Order (TRO) from the Supreme Court to stop local authorities from enforcing the ICC warrant, but the Court denied his plea, clearing the way for his arrest by the PNP, NBI, and other agencies backed by the Armed Forces of the Philippines.
Current Status: Following a standoff and shooting incident involving law enforcement and Senate security, Senator Dela Rosa evaded custody, went into hiding, and is now officially classified as a fugitive.
Legal Effect: He is actively evading arrest and cannot safely or legally appear in public or Senate premises. His absence is involuntary and compelled by the need to avoid arrest. He remains a senator and part of the 13-member majority, but is physically unavailable due to active legal processes.
✅ CONCLUSION ON ABSENCE:
Total Constitutional Majority: 13 Senators
Physically present & supporting Cayetano on June 3: 11 Senators
Legally/Physically unable to attend (detained/fugitive): 2 Senators (Estrada & Dela Rosa)
Voluntarily absent: NONE
This confirms that the 13-senator majority is real, existing, and legally complete. The Gatchalian group only has 12 — a clear minority — and they benefited from the fact that two opposing senators were legally prevented from showing up. To count only those present and ignore those detained or hiding from warrants is a grave distortion of the Constitution.
IV. LEGAL ARGUMENTS: WHY CAYETANO REMAINS LEGITIMATE & GATCHALIAN’S CLAIM IS VOID AND CRIMINAL
🔴 ARGUMENT 1: THE 1987 CONSTITUTION CHANGED EVERYTHING — AVELINO V. CUENCO NO LONGER APPLIES
The Gatchalian group relies entirely on a 1949 Supreme Court case called Avelino v. Cuenco. But here is the critical fact: that case was decided under the 1935 Constitution, which did not have the phrase “by a majority vote of all its respective Members.”
1935 Constitution: Only said “the Senate shall elect its President.” No rule on counting. The Court allowed election by majority of those present → Avelino applied.
1987 Constitution: EXPRESSLY ADDED the rule: “majority vote of ALL members” → 13 votes are mandatory, always.
The Supreme Court has ruled many times: when the Constitution changes, old rulings based on the old text no longer apply. The 1987 Constitution deliberately rejected the Avelino rule to stop exactly what happened here: a minority trying to seize power, especially when members of the majority are legally barred from attending.
✅ Cayetano: Elected by 13/24 → Follows 1987 Constitution → VALID❌ Gatchalian: Elected by 12/24 → Breaks 1987 rule → VOID
🔴 ARGUMENT 2: NO QUORUM = NO VALID SESSION = ALL ACTS ARE CRIMINAL
Article VI, Section 16(2) defines quorum clearly: majority of all members = 13.
June 3, 2026: only 12 present → NO QUORUM
Absent: 2 Senators — Estrada (detained) and Dela Rosa (fugitive) — both involuntary absences due to legal process, plus 11 other senators who were present or absent lawfully.
The false claim that “absent senators are not counted” is unconstitutional and wrong, especially here. Senators Estrada and Dela Rosa are still members; their seats are not vacant, they have not been expelled, and their inability to attend is caused by the State’s own legal actions against them. The Constitution never says you can reduce the required number just because some people are in jail or hiding from warrants.
Legal Rule: “Quorum is based on total membership, not attendance. Without quorum, no business is legal — and those who act anyway risk criminal liability.”— Arroyo v. De Venecia, G.R. No. 123169, August 14, 1996
🔴 ARGUMENT 3: NO VACANCY EXISTED — DECLARING ONE WAS USURPATION
Senator Cayetano was properly elected, qualified, and serving as Senate President. He did not resign, was not impeached, was not expelled, and did not pass away. In law and in fact, there was no vacancy. Even counting the legal troubles of Estrada and Dela Rosa, their seats remain occupied — there is no vacancy in the Senate, only temporary inability to attend.
The Senate Rules do not allow a small group to simply “declare a vacancy.” A vacancy only happens by law, or through the same process needed to remove a leader — which requires 13 votes. The 12 senators had no power to declare the position empty. Doing so was a direct theft of authority.
“An office legally occupied by a lawful leader cannot be declared vacant by a minority, without reason, and without following proper process.”
🔴 ARGUMENT 4: “AT THE PLEASURE OF THE SENATE” MEANS THE PLEASURE OF THE CONSTITUTIONAL MAJORITY
When rules say the Senate President serves “at the pleasure of the Senate,” “Senate” means the full body of 24 members, not whoever happens to be in the room, or whoever is not in jail or hiding. Its will is only valid when expressed by the constitutional majority: 13 votes.
Cayetano: Has 13 committed supporters → True, permanent majority (11 present + 2 legally absent)
Gatchalian: Has only 12 → Minority, no matter what they call themselves
If we accepted their argument, it would mean that anytime members of the majority are detained or facing warrants, the remaining minority can take over — turning the Constitution upside down. This is exactly the abuse the 1987 Constitution was written to prevent.
🔴 ARGUMENT 5: OFFICIAL RECOGNITION DOES NOT FIX A CRIME OR UNCONSTITUTIONAL ACT
Posting Gatchalian’s name on the Senate website or acknowledging him in Malacañang is only an administrative act — it is not legal approval. Not even the Executive Department can validate something that violates the Constitution.
The Supreme Court has ruled repeatedly:
“An unconstitutional act is not a law; it gives no rights, orders no duties, offers no protection; in the eyes of the law, it is as if it never existed.”— Marbury v. Madison, 5 U.S. 137 (1803); applied in Philippine courts
Recognition cannot make 12 votes equal to 13, or turn an illegal meeting into a legal one. More importantly, it cannot erase criminal liability. Even if some people believed them, they knew they only had 12 votes — meaning they acted with clear intent to break the law.
V. JURISPRUDENCE: SUPREME COURT CASES THAT PROVE CAYETANO IS LEGITIMATE
🔹 ARROYO V. DE VENECIA, G.R. No. 123169 (1996)
Facts: A group tried to remove the House Speaker with fewer than a majority of all members. Ruling:
“The Constitution is clear: election must be by majority vote of all members. This means majority of the entire membership, not just those present. Any election with fewer votes is null and void. Quorum is counted based on all members, not attendance.”
Why it matters: This case was decided under the 1987 Constitution — it is the current, controlling law. It confirms 13 votes are mandatory, regardless of why some members are absent.
🔹 PIMENTEL V. SENATE, G.R. No. 187714 (2011)
Ruling:
“Senate rules must follow the Constitution. Any rule or practice that contradicts the Constitution is void. The Senate cannot change the constitutional requirement of majority of all members just by making a new rule.”
Why it matters: It kills the argument that “parliamentary practice” allows their actions. Practice cannot override the supreme law.
🔹 NACIONALISTA PARTY V. COMELEC, G.R. No. 134577 (1998)
Ruling:
“The rule of majority of all members applies to all elections and removals, not just the very first one. The Constitution makes no difference — we must apply it the same way every time.”
Why it matters: Removing or replacing a Senate President needs the same 13 votes as electing one. Gatchalian had only 12 → invalid.
🔹 LIM V. PELAEZ, G.R. No. L-21540 (1963)
Ruling:
“Where the Constitution has set a clear rule, we cannot interpret it to change it. We must obey it exactly as it is written.”
Why it matters: The text says “majority of all members.” No legal trick can lower that number to 12, even if members are detained or fugitives.
🔹 PEOPLE V. SANDIGANBAYAN, G.R. No. 104768 (1994)
Ruling:
“Illegal acts produce no legal results. Everything done based on an illegal act is also illegal and void.”
Why it matters: All actions, appointments, or decisions made by Gatchalian or his group are legally non-existent.
VI. FULL CRIMINAL LIABILITY & PENALTIES
✅ SENATOR SHERWIN GATCHALIAN
Crimes Committed:
Usurpation of Authority (Art. 177): Main offender
Penalty: 6 months 1 day to 4 years 2 months imprisonment
Additional: PERPETUAL SPECIAL DISQUALIFICATION — banned forever from holding public office, voting, or exercising civil rights
Usurpation of Legislative Powers (Art. 150): Main offender
Penalty: Same range + Absolute Disqualification
Unlawful Assembly (Art. 148): Leader and organizer
Penalty: 6 months to 2 years imprisonment
Total Maximum Penalty: Up to 6 years imprisonment + PERMANENT BAN FROM PUBLIC SERVICE
✅ ALL 12 SENATORS WHO JOINED & SUPPORTED HIM
Crimes Committed:
Usurpation of Authority (Art. 177): CO-PRINCIPALS — they helped, supported, and recognized the illegal act
Penalty: Same as the leader: 6 months to 4 years 2 months imprisonment
Disqualification: Temporary or permanent, depending on their role
Disturbance of Proceedings (Art. 144): Interrupted the lawful work of the Senate
Penalty: 1 to 6 months imprisonment
Unlawful Assembly (Art. 148): Willful participants
Penalty: 6 months to 2 years imprisonment
Conspiracy to Usurp Powers (Art. 8 + 177): They agreed together to break the law
Penalty: Same as the main crime
Additional Penalties:
Fine: Up to ₱6,000 (Art. 143)
Senate Discipline: Expulsion or suspension allowed under Article VI, Section 17 of the Constitution
VII. ANALYSIS & CONCLUSION
⚖️ LEGAL SUMMARY
CONSTITUTIONAL RULE:
1935 Constitution: “Majority of those present” → Old rule, no longer applies.
1987 Constitution: “Majority of ALL members” → 13 votes required, every time.
This change was done on purpose to stop power grabs by minorities, especially when members are legally prevented from attending.
NUMBERS DO NOT LIE:
Cayetano: 13 votes → Constitutional Majority → LEGITIMATE (11 present + 2 legally absent: Estrada & Dela Rosa)
Gatchalian: 12 votes → Minority → ILLEGITIMATE
Quorum: 13 needed; 12 present → NO QUORUM → SESSION ILLEGAL
“ACTING SENATE PRESIDENT” IS A FICTION:The Constitution and Senate Rules do not have any position called “Acting Senate President.” This title was invented only to bypass the law — it has no legal meaning.
ABSENCE DUE TO LEGAL PROCESS IS NOT A SURRENDER:Senators Estrada and Dela Rosa did not abandon their bloc. One is detained by the State; the other is hiding from State-issued warrants. Their absence is involuntary and cannot be counted against the legitimate majority.
✅ FINAL LEGAL RULING
SENATOR ALAN PETER CAYETANO IS THE SOLE, LAWFUL, AND LEGITIMATE SENATE PRESIDENT. He was elected May 11, 2026 with the required 13 votes — the constitutional majority — and has never been legally removed or replaced. The fact that two of his supporters are currently detained or fugitives does not reduce his legal majority.
THE JUNE 3, 2026 SESSION WAS ILLEGAL, UNCONSTITUTIONAL, AND CRIMINAL. It was held without a quorum, and the attempted election of Senator Gatchalian failed to meet the mandatory requirement of votes from the majority of all members.
SENATOR SHERWIN GATCHALIAN AND THE 12-SENATOR FACTION ARE CRIMINALLY LIABLE under:
Article 177: Usurpation of Authority
Article 143 & 144: Disturbance of Legislative Proceedings
Article 148: Unlawful Assembly
Article 150: Usurpation of Legislative Powers
PENALTIES:
Imprisonment: 6 months to 6 years
Disqualification: Temporary or PERPETUAL from holding any public office
Fines: Up to ₱6,000
ALL ACTS, RESOLUTIONS, APPOINTMENTS, AND PROCEEDINGS done by the group led by Gatchalian and Zubiri are NULL AND VOID and have no legal force or effect.
“The Constitution is not just a piece of paper — it is the supreme law. It counts every member, whether free, detained, or sought by warrants. It protects the rights of the majority, and it protects the Filipino people from power grabs by the few. To violate it is not just a mistake — it is a crime.”
VIII. RELATED ISSUE: SENATE BLUE RIBBON COMMITTEE & FLOOD CONTROL PROBE
Because the reorganization itself is void, the so-called “reconstitution” of the Senate Blue Ribbon Committee is also legally non-existent. The committee remains under the leadership and membership appointed by the lawful Senate President, Alan Peter Cayetano.
Notably, the flood control probe is highly relevant here: Senator Jinggoy Estrada is currently detained specifically over charges related to kickbacks in these very same flood control projects. The illegal Gatchalian faction’s attempt to reopen this probe is a blatant conflict of interest and an abuse of process, done without legal authority.
Any hearings, orders, or reports from that illegal committee are inadmissible in court and have no official weight. Only the Senate acting through its constitutional majority of 13 senators can validly organize, change, or direct its committees.
//Pimentel Pinky
