By reinvigorating the US alliance, Marcos may plausibly have hoped to empower and cultivate the loyalty of the more pro-US elements of the military – which had earlier worked behind the scenes to stymie Duterte’s efforts to jettison the alliance.
The political neutrality of security forces is not something to be taken for granted in a country which has seen a litany of alleged coup plots in recent decades. Marcos would have an intimate understanding of this dynamic, given the military’s role in helping end his father's dictatorship.
Early on in his term, Marcos was reportedly exercised by fears that Duterte loyalists had entrenched themselves in both the police and military. Marcos’ refusal of Sara Duterte’s request to be defence minister was instructive on this point.
As well as helping to cultivate the military, the re-embrace of the US alliance has been popular with the public, especially insofar as it has facilitated a more assertive stance on maritime disputes.
Duterte’s initial obeisance to Beijing failed to guarantee fishing rights or secure any joint oil and gas development deals. Chinese investment fell well short of anticipated numbers, though Chinese lending did increase markedly.
By contrast, the Biden administration has made no secret of its efforts to up its economic game in the Philippines. The centrepiece is the Presidential Trade and Investment Mission and the so far mostly conceptual US$100 billion Luzon Economic Corridor, established under the auspices of the G7’s Partnership for Global Infrastructure. As an additional blandishment, the United States last month announced an additional US$500 million in military aid.
Marked differences on foreign policy are unlikely to have played a dispositive role in fracturing the Duterte-Marcos alliance, which is better explained by Duterte Snr’s pre-existing dislike of Marcos, intra-elite competition for state resources and Marcos’ flirtation with a plan to change the Constitution to bypass presidential term limits.
Foreign policy has nonetheless served as a vector for political competition. Marcos has excoriated Duterte snr for signing a “secret” deal with China on the South China Sea. Marcos’ allies in parliament pointedly re-directed funds previously controlled by Sara Duterte to the country’s coast guard.
For his part, Duterte snr hyperbolically claimed that the United States is seeking to station nuclear weapons at EDCA sites, and that the Philippines risks becoming a “graveyard”.
Intriguingly, in a sign that the Marcos’ are also struggling to maintain a united front, Bongbong’s sister Imee Marcos has made similarly vociferous claims about the risks posed by EDCA. The burgeoning alliance between Imee Marcos and Sara Duterte epitomises the fluidity of elite Filipino politics.
With Sara Duterte likely to seriously consider a presidential bid in 2028, it is conceivable that there will be another pivot in Manila’s foreign policy.
The tendency for successive administrations to oscillate between Beijing and Washington is not a new dynamic in Filipino politics. However, past divergences have generally not been quite as pronounced and took place in a much less polarised international environment. For the US, alliance planning and the coherence of its overall strategy in maritime Southeast Asia has become considerably more fraught.
* This article was corrected to clarify that Sara Duterte resigned her cabinet roles, not as vice president.