Ha, Mexico and the US - that's what's called an unequal partner. Mexico has endured humiliation after humiliation from the US.Or you align with that stronger neighbor, which is something that say Laos is doing, but also what Mexico and Canada is doing in relation to their neighbor, the US.
Ofc, as it currently stands, the Philippines have a longer history of alignment with the US (willing or unwillingly) not to mention it's 'elite' has lots of relations with US (military officers graduating in schools etc. in the US, similarly with a lot of wealthy individuals and their kids going to prestigious universities in the US).
Let's see..... we have the treaty of Guadalupe-Hidalgo where Mexico lost half of its territory! The overthrow of Francisco Madero after U.S interference, incursions into Mexican territory ordered by Woodrow Wilson, and the constant inference of Mexican internal affairs by the DEA, CIA, etc...
Mexico has learned to take it up the ass because it's small fish trying to survive with a shark. Yea, I think Philippines knows what's going to happen if China rules Asia. And it's not China's fault. Just the rule of the jungle.