Has something similar to the Indian Citizenship Act (granting Native Americans citizenship) been passed?
Not yet, and probably won't be for a while, because...
IIRC the ones in the US are being aggressively assimilated and the ones in OTL Oklahoma are now basically an American protectorate with their own sovereignty.
This is happening, and the Indian Wars were way bloodier, and deportations to Sequoyah have been fairly aggressive. So Natives absolutely have it worse ITTL.
But *net* the USA iTTL will have a higher percentage of European Ancestry than our own simply due to having the percentage with African Ancestry cut so much, right? I *think* the Author has indicated that the first US President that isn't entirely of European ancestry is Hispanic(Sandoval?), right?
Net or similar, I'd say. I've had a hard time calculating out exactly what the figure would be.
IOTL 2020, 23.5 million of 47 million total African Americans live in states that are not in TTL's CSA, prewar. This of course is a byproduct of the Great Migration of not only 1910-30 (which we're facsimiling with the post-GAW refugee crisis) but also the Second Great Migration of 1940-70, which was larger and more robust, and which we might see some kind of facsimile of later on. Bear in mind that the Black population of Northern states has been in decline since the mid-1990s, with the "New South" and Reverse Migration, etc.
Canada's Black population is about 4.2% of the population. 23.5 million Black Americans out of 320 million (the 2020 TTL US census figures, bit of a spoiler but who cares) comes out to about 7.2%. So if we adjust that 23.5 down a little to account for A) a lessened 1940-70 migration but perhaps a higher 1970-2000 migration, for instance) and B) a lower 1910-30 migration as well due to the various GAW atrocities, etc, I would feel comfortable just 1.5x Canada's "rate" which gives us a Black population of about 20,000,000 in the United States or 6.3% of the population.
Now, that's not nothing, and certainly a population that could punch above its weight (like Jewish Americans), but it's more similar to OTL's Irish or Polish American population than anything else, and is probably
a population that is still gradually growing north of the Ohio in the 2020s, rather than decamping for cheaper, growing metros in North Carolina, Georgia, Florida, Texas etc like IOTL.
Idk what y'all think, but does that look like a reasonable figure?
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As for Hispanics, yes, Brian Sandoval would be our first nonwhite President; however, I have loose plans that aren't entirely canon yet of a nonwhite VP/Prez candidate whos a bit of a Mondale/Quayle ‘96/Lieberman ‘04 stand-in for the 2000s who is nonwhite, but not Black or Hispanic.
My thinking on the Hispanic pop is that the raw number of Mexican-Americans in the Southwest (but not necessarily percentage proportion) is the same as OTL (so California for instance still has around 12 million residents of Mexican descent, but they are not 1/3 of the population but rather more like 1/5), while in the Upper Mountain West you're at 60-70% of OTL raw (so my home state of Washington, for instance, might have 500k Mexican descent rather than 790k) and then as you go east that number drops precipitously to maybe 20-30% of OTL raw, which of course is then proportionately even smaller with much higher state populations than OTL sans snowbirding/Reverse Migration. (So Pennsylvania might have 40-50k Mexican descent rather than 160k)
Take into account way fewer Cuban (no Florida and more stable Cuba) and especially Puerto Rican Americans (no internal migration rights until NAFTA in the 2010s) and you've probably got a Hispanic population of the US that's more like 10-11% of the total rather than 20-21%, which means that total Hispanic population of the United States would ITTL be less than Mexican-Americans on their own.
Combine that with a way higher Asian population (my math suggested 18 million Chinese descent by 2020 alone!) and yes, you've then got a very different demographic mix in the United States, and one that without the South skews way more Catholic (thanks to the North and the still-large Hispanic pop) and more Jewish, without the restrictions of the 1924 Immigration Act and sans a Holocaust.
If anybody wants to toy with my figures they're welcome to - demographic calculations I find fun but I'm not always sure I get them right.
Still waiting to see what "Building a Wall" in the Appalachians between West Virginia and Virginia/Kentucky is going to look like.
Heh.