LOCAL
Two questions decide whether Manila acts as one country: the Marcos–Duterte split, and whether the 2014 Bangsamoro peace deal holds. The first parliament (Sept 2026) came out hung; IS-linked groups feed on every stall. A divided capital answers the sea more slowly.
REGIONAL
The claimant that pushes back hardest and most publicly — the 2016 arbitral award, and the policy of publicising Chinese coast-guard incidents. Second Thomas and Scarborough shoals are where Chinese coercion gets tested first. If Manila's pushback holds, other claimants have a model; if it folds, they have a warning.
GLOBAL
The only South China Sea claimant with a US defence treaty — one Washington says covers Philippine coast guard vessels anywhere in the sea. Luzon faces Taiwan across the Luzon Strait, and US Typhon and NMESIS deployments there make the Philippines part of any Taiwan contingency.