*Before I proceed, let me put a caveat into this thing: I am not saying here in this article that it is best for the Marcos Jr. administration not to proceed with the anti-corruption probe. I get the President — this is not about 2028 — this is about a long-lasting legacy that a Marcos may eventually contribute to our country. This is just an analysis of the political fallout the BBM administration will face in the immediate future if all these probes amount to nothing.

This early, it is highly certain that the Marcos Jr. administration has already lost much of the voter-rich corridor spanning Regions 1, 2, 3, and 4—areas that have long been decisive in national elections—largely as a consequence of the ongoing probe into the alleged plunder of flood-control projects. What began as a declaration of seriousness in the fight against corruption has become a political stress test, exposing how fragile the coalition behind President Ferdinand Marcos Jr. really was—and how quickly credibility can isolate power.

This means it is highly probable that Sara Duterte will further strengthen her chances of clinching the presidency in 2028, since this voting corridor is the only barrier to her success. There’s a caveat, though. Read through and subscribe to our channel and to our video presentation at Youtube.com/currentphnewstv.

In Philippine politics, coalitions are not built on ideology but on predictability. Voters matter, but brokers matter more. When enforcement disrupts the expectations of local elites—contractors, political families, regional operators—the electoral machine stalls.

Anti-corruption as coalition shock

Anti-corruption campaigns are rarely neutral. They are elite conflicts fought through institutions. In systems organized around patronage, enforcement breaks informal bargains that sustain political order (North, Wallis, and Weingast 2009).

By allowing probes that reach into infrastructure networks tied to political power, the Marcos administration has sent an unmistakable signal: political access no longer guarantees insulation. That may please reform-minded constituencies. But it unnerves the intermediaries who deliver votes across the so-called voting alley.

Susan Rose-Ackerman has long warned that anti-corruption efforts become politically destabilizing when they threaten rent-sharing arrangements without replacing them with a new governing coalition (Rose-Ackerman and Palifka 2016). Marcos Jr. appears to be confronting that exact problem—credibility without a fallback alliance.

The erosion problem

The immediate effect of losing grip over Regions 1 to 4 is not mass voter defection. It is elite hesitation. Local actors hedge, delay commitments, and quietly distance themselves from a presidency that now looks risky to associate with.

This erosion weakens endorsement power. Research on political legitimacy shows that leaders who rule through enforcement rather than coalition management often struggle to transfer authority to successors (Levi, Sacks, and Tyler 2009). Endorsements lose value when they no longer promise protection or access.

By 2028, a Marcos-backed candidate may discover that the endorsement once considered decisive has become inert—or worse, a liability.

Does this automatically benefit Sara Duterte?

Not necessarily.

The counter-claim matters: coalition erosion does not guarantee coalition transfer. Vice President Sara Duterte benefits from the current dynamic only indirectly, and only if she avoids inheriting the same contradictions.

Yes, she is structurally advantaged in the short term. She remains insulated from the costs of the current crackdown. Political economy research shows that when reform creates uncertainty, elites gravitate toward figures perceived as outside the enforcement cycle (Rothstein and Teorell 2008).

But insulation cuts both ways.

Duterte’s distance from the anti-corruption drive also limits her ability to claim moral authority over it. If she is seen as merely the beneficiary of Marcos Jr.’s political losses—rather than the architect of a coherent alternative—her coalition risks becoming a holding pattern for disaffected elites rather than a governing project.

Moreover, fragmentation favors no one permanently. Dan Slater’s work on Southeast Asia shows that when ruling coalitions fracture without a clear successor order, politics enters a volatile phase marked by shifting alliances rather than clean transfers of power (Slater 2010).

In that scenario, Duterte does not inherit a consolidated voting alley. She competes in an open field shaped by distrust, risk aversion, and transactional politics—conditions that reward tactical flexibility but punish overconfidence.

The reformer’s paradox, sharpened

What the Marcos administration is confronting is the reformer’s paradox in its purest form. Anti-corruption strengthens institutions while hollowing out the political machinery that sustains incumbents. The gains are long-term and abstract. The losses are immediate and electoral.

Marcos Jr. may leave office with a stronger claim to seriousness—and a weaker ability to shape what comes next. His administration risks becoming a presidency that governs firmly but cannot reproduce itself.

And here is the harder truth: in Philippine politics, seriousness is respected—but rarely rewarded. By choosing credibility over coalition comfort, Marcos Jr. may have improved the state while shortening his shadow over 2028.

If his endorsement once crowned winners, it may soon serve as a warning label—proof that in a system built on protection, the most dangerous ally is the one who finally means what he says.

References:

Levi, Margaret, Audrey Sacks, and Tom R. Tyler. 2009. “Conceptualizing Legitimacy, Measuring Legitimating Beliefs.” American Behavioral Scientist 53 (3): 354–375.

North, Douglass C., John Joseph Wallis, and Barry R. Weingast. 2009. Violence and Social Orders. Cambridge: Cambridge University Press.

Rose-Ackerman, Susan, and Bonnie J. Palifka. 2016. Corruption and Government: Causes, Consequences, and Reform. 2nd ed. Cambridge: Cambridge University Press.

Rothstein, Bo, and Jan Teorell. 2008. “What Is Quality of Government? A Theory of Impartial Government Institutions.” Governance 21 (2): 165–190.

Slater, Dan. 2010. Ordering Power: Contentious Politics and Authoritarian Leviathans in Southeast Asia. Cambridge: Cambridge University Press.