Excellent chart. There was a magazine cover from the 1980s, maybe the National Review, in which Reagan had a tear in his eye, with this same theme. Prophetic.
I could say that we can still slow down family-sponsored and illegal immigration from the 3rd world, and save Texas, but it’s really difficult to reverse such trends. That’s why the Indians lost North America; they were overwhelmed by Europeans. I can argue that North America has done well in the 19th and 20th centuries (the USA was 50% of the world economy after WWII), but imagine being under the thumb of Obama/Reid/Pelosi/Sotomayor clones forever.
Hispanics and Leftists don’t know it yet, but the world will be a worse place for them too. I think it will work out well for China though.