Mexico, Immigration, Cultural Conquest
I bet if america had open borders for immigration and an active policy of cultural infiltration into mexico, some of Mexico’s northern states would want to revolt and suceed from Mexico and join the United States. The USA could be come ‘The United States of ALL of North America’ without firing a single round 
Then ‘The United States of the Western Hemisphere’.
I don’t think it would be as straightforward as galciv2 as opressometer (MOO3 concept) and morale/approval, and other factors would play a role. But 4 times the native influence is a lot and i’m pretty sure that the USA has 2 to 3 times the native cultural influence into Mexico’s northern states. Whats great with Mexico is that both countries are Federal Republics (Canada is a Constitutional Monarchy). Very compatible. We then give our new subjects full rights, freedoms, and citizenship.
Making illegal immigration a felony just shows that america is ever so gradually becoming a (3rd+ generation american born mix-races of at least half-white seem to be ok; 2/3 white if native north/central/south american indian) fortified white corporate supremist police state.
