With all the turmoil going on in North America, especially in the United States, with strong racism, classism, and social tension and unrest, disintegration is a possiblity, but it wont be bounded by state/political lines, I think it would be bounded more by racial/cultural lines.
This is how I think North America (and the US in particular) would look like 20-50 years after a major internal war and migrations resulting from that. These are the new countries that would form.
Starting from east to west:
Arcadia (light blue)- predominately white, french canadian country. Northern New England & SE Canada (Maine, New Hampshire, Vermont, northern New York, Nova Scotia, New Brunswick). Feels like a mix of rural France and rural England.
Atlantic Union (darker blue)- very diverse & tolerant, continuation of the old United States, particularly the somewhat liberal eastcoast. Stretches from Massachusetts to Virginia, includes the interior Northeast and the southeastern Ontario/Toronto area. Major cities include Toronto, Hamilton, Buffalo, Boston, New York City, Philadelphia, Pittsburgh, Baltimore, Alexandria, Richmond, and Newport News. poltically moderate and somewhat liberal leaning.
Nubia (orange)- predominatly native Black American, with decent number of black & non-black immigrants. Pro-black African American nation. U shaped, reflecting the abundance of majority black counties in this region, and many blacks migrating back during internal war, due to most having roots there and already high number of blacks. major cities include Atlanta, Charlotte, Raleigh, Norfolk, Virginia Beach, Charleston, Savannah, Jacksonville, Tallahassee, Birmingham, and Memphis. Possible capital is Atlanta. politically moderate and socially conservative.
Florida (golden yellow)- mixed nation, dominated by black Americans, white Americans, and assimilated Hispanics/Caribbeans (Puerto Ricans, Cubans, Haitians, Jamaicans). The Northern 3/4ths of the Florida peninsula (does not include the panhandle). Feels like a very unique nation, culture feels like a blend of US Southerner and Caribbean islander. Major cities include Orlando and Tampa.
Miami region/South Florida (light green)- becomes apart of Cuba.
Louisiana (teal) - mixed nation, dominated by black Americans, white Americans, and mixed Cajun/Creole. Feels like a mix of Haiti and Quebec, with a strong southern Anglo American twist. Centered around New Orleans, other major cities include Baton Rouge and Mobile.
The Confederacy (dark red) - In the heartland of the former United States. Very white, especially of Scottish and German ancestries. Very conservative. Unlike the historical 1800s Confederacy, this one is mostly in the Midwest, but is very Pro-White and intolerant, just like the old one, intolerant whites in the south fled to the midwest where theres similarly intolerant whites, because of the South being overtaking by African Americans. Major cities include Cleveland, Columbus, Cincinatti, Louisville, Nashville, Indianapolis, Detroit, Chicago, St Louis, Milwaukee, Kansas City, Minneapolis, Omaha.
Texas (brown)- mixed nation, dominated by white Americans, black Americans, and mexican americans. Blend of southwest, deep south, and great plains cultures. Major cities include Houston, Dallas, Ft Worth, Oklahoma City, Tulsa, Austin, San Antonio, and Corpus Christi. Very conservative.
Atzlan (dark green)- mostly mexican american, southwest US and northern half of mexico (while the southern half of mexico annexes Guatemala). Blend of northern mexican and southwest american cultures, like modern day chicano culture. Major cities include El Paso, Alberquerque, Phoenix, Las Vegas, Los Angeles, San Diego, and Ciudad Juarez.
Deseret (pink)- mostly white, very liberal, dominated by mormons. Major cities include Denver, Salt Lake City, and San Francisco.
Cascadia (purple)- mostly white, some asian too. Very liberal. Pacific Northwest and British Columbia. Major cities include Portland, Seattle, and Vancouver.
Oklahoma (beige)- mostly native american and white. North Central US and Central Canada (west Ontario to the BC border). Does not include the actual state of Oklahoma. Calgary is the major city.
Hawaii becomes its own nation, liberal, somewhat diverse, dominated by asians and pacific islanders.
Alaska becomes its own nation, conservative, dominated by whites and natives. It annexes Yukon Territory.
Quebec becomes its own nation, liberal, mostly whites, it becomes another France. It annexes Newfoundland and Labrador.
Puerto Rico becomes its own nation, socially conservative, and dominated by mixed race Hispanics. It annexes the Virgin Islands, and later unites with the Dominican Republic.
I think Brazil would suffer a similar breakup. With the south coast around Porto Alegre being a almost exclusively white country similar to Argentina. The east coast around Salvador and Recife being predominately mulatto/mixed and black similar to Dominican Republic and Puerto Rico. The vast interior would be predominatly native similar to Peru.
Do you guys agree with my map?