Some Mexicans in the USSA are descendants of the tribes that used to inhabit a lot of the USSA, only as tribes. There's a lot of Shawnee down in old Mexico that refused to be "resettled" at the insistence of the u.S. government. The Shawnee of course, originating in Ohio, West Virginia, Indiana and the vicinities.
I like this thread. That old dude was spot on correct.
"The more artificial taboos and restrictions there are in the world, the more the people are impoverished.... The more that laws and regulations are given prominence, the more thieves and robbers there will be." - Lao Tzu, 6th century BC