User blog comment:Callumthered/Mexico beats America?/@comment-32656-20120206091304

It's not plausible, really. A question of arms, numbers, and tech, in the end. Such a scenario would need a PoD well before when it started otl.

Even in the event that war was avoided, the area would become American eventually anyways. Heck, by the war something like a third of the population of California was English. With more coming each year.