THERE are moments in Philippine politics when institutions stop behaving like ordinary government bodies and begin revealing their deeper purpose. The Philippine Senate is entering such a moment again.
To understand the turbulence now surrounding the Senate presidency, the impeachment of Vice President Sara Duterte, and the quiet but unmistakable maneuvering toward 2028, one must first understand what the Senate truly is, and why Filipinos have long regarded it as hallowed ground.
The word “Senate” comes from the Latin senatus, derived from senex, meaning “old man” or “elder.” In ancient Rome, the Senate was not designed as a populist chamber. It was meant to be a stabilizing institution, a council of experienced political elders tasked with preserving continuity, restraining excess, and managing elite consensus during periods of instability. That same institutional DNA survives today.
The Philippine Senate traces its roots to the Jones Law of 1916, when the Americans established a bicameral legislature modeled after the United States Congress, itself heavily inspired by the Roman Republic. From the very beginning, the Senate was envisioned not merely as a legislative chamber but as a national political arena, a place where statespeople, not merely politicians, would govern.
It is no accident that many of the country’s most consequential leaders emerged from the Senate: Manuel Quezon, Claro Recto, Lorenzo Tañada, Ferdinand Marcos Sr., Benigno Aquino Jr., Jovito Salonga. The Senate became associated with constitutional struggle, national legitimacy and the continuity of the Republic itself.
This is why leadership changes inside the Senate are never just administrative reshuffles. They are signals of deeper political movement.
Under President Ferdinand Marcos Jr., the Senate has already seen multiple leadership changes in a remarkably brief period: Juan Miguel Zubiri, Francis Escudero, Tito Sotto, and now the growing speculation surrounding Alan Peter Cayetano. Such fluidity is not normal even by Philippine standards. It reflects a political system already transitioning into early succession mode. At the center of this instability is the collapse of the Marcos-Duterte “UniTeam” alliance.
The Senate presidency suddenly matters because the Senate is no longer merely preparing to legislate. It is preparing to sit as an impeachment court. And that changes everything.
Who controls the Senate presidency controls not only committee assignments and floor recognition, but also the political atmosphere surrounding the impeachment trial of Vice President Sara Duterte. Even if no Senate president can single-handedly dictate conviction or acquittal, leadership shapes tempo, coalition behavior and institutional perception. This is where reservations surrounding Alan Peter Cayetano emerge.
The concern is not simply about competence. Cayetano is an experienced legislator. The concern is political alignment. He is widely perceived as closer to the Duterte bloc than to the Marcos camp or the Senate’s so-called institutionalists. In ordinary times, that may not matter. But impeachment is not an ordinary political exercise. It is a constitutional collision with national consequences.
For the Marcos bloc, the fear is obvious: a Senate leadership perceived as sympathetic to Duterte may soften the impeachment environment. For Duterte allies, the fear is the opposite: that Senate leadership hostile to Sara Duterte could transform impeachment into political elimination before 2028. The Senate has therefore become the battlefield where the post-UniTeam order is being negotiated.
But the impeachment issue is not the only pressure point.
Hovering quietly in the background is the politically radioactive issue of flood control projects and infrastructure spending. Public frustration over recurring flooding, massive flood control budgets, allegations of ghost projects, and growing scrutiny over infrastructure allocations have made the issue symbolically dangerous. Flood control is no longer merely a governance problem. It is becoming a corruption narrative.
This matters because Senate investigations — particularly through the blue ribbon committee — have historically served as instruments of both accountability and elite warfare. In Philippine politics, investigations are never purely technical exercises. They are coalition-sensitive operations. Whoever controls the Senate also influences the pace, visibility and direction of politically damaging inquiries.
Thus, the current Senate turbulence is not about one personality. It is about overlapping struggles: impeachment, succession, corruption exposure, coalition survival, and control of the national narrative.
This explains why the coming State of the Nation Address of President Marcos in July 2026 may be one of the most politically consequential SONAs since the restoration of democracy in 1987.
The administration will likely attempt to project stability amid fragmentation. Expect heavy emphasis on economic resilience, inflation management, infrastructure continuity, food security, energy investment, and climate adaptation. Flood control and disaster resilience will almost certainly feature prominently because the government understands the political toxicity of recurring flooding.
Marcos will likely speak the language of unity, institutional stability, constitutional order and democratic continuity. The message will be calibrated not only for the Filipino public but also for markets, investors, local political clans, the military establishment and foreign governments.
But beneath the formal rhetoric lies the deeper political question haunting Philippine politics today: Who will control the post-Marcos future?
The Senate is now functioning exactly as senates historically functioned from ancient Rome onward, as the arena where elite factions negotiate succession, survival and legitimacy during periods of political uncertainty. That is why the Senate remains hallowed ground.
Not because its members are always noble. Not because politics inside it is always clean. But because when the Republic enters periods of transition, crisis, or fracture, the Senate becomes the institution where the struggle for the nation’s political soul is most visibly fought. And in the Philippines today, that struggle has already begun.
