alternatehistory.com

the US Census of 1860 tells us that the CSA had a 40% black population, the break down as such:

1860:
Alabama: 45% black
Arkansas: 26%
Florida: 44%
Georgia: 44%
Louisiana: 47%
Mississippi: 55%
North Carolina: 33%
South Carolina: 57%
Tennessee: 25%
Texas: 30%
Virginia: 31%

so what POD could bring us these numbers:

2010:
Alabama: 48% black
Arkansas: 29%
Florida: 47%
Georgia: 47%
Louisiana: 50%
Mississippi: 58%
North Carolina: 36%
South Carolina: 60%
Tennessee: 28%
Texas: 33%
Virginia: 34%

and how would having so many black majority (or close to majority) state change the USA?
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