you could make a focus tree making mexican paths:
1: a hardline communist focus tree that includes making popularity, assasinating traitors and stabilizing and making the country in to a super power.
1.a: with this, you decided to be isolationist.
1.b: since you want revenge in the American-Mexican war, you declare war on the US.
2: you have the status quo, you make Mexico a propsering place for all people and end problems in Mexico.
3: Mexico's paternal popular, nationalist, and accelerationst parties succeed.
3.a: The Praternal Populists succeed, you make a centralized mexico who wants revenge.
3.b: The Nationalists succeed, you increase spending with the army 10x and prepare the subjugation of America under Meixco.
3.c: The Acceleriatonists won, you make the speediest american state, make traitors and everyone who dont support the regime dead, and ally with France.
Mexico might have coring decisions to core states that Mexico lost in the American-Mexican war.
The Accelerationsts rename Mexico an aztec state and revive sacrifices in aztec culture.
Warning: its just a suggestion, ouy can accept ,you can decline it.