I don't know about balkanization but here are some maps that show states divided by political policies. These maps show an interesting pattern.
States which ban gender affirming care
States which have "right to work" law. Unions are banned from forming employment agreements with companies.
States which ban same sex marriage in their state constitution
States where abortion is currently illegal
States which have laws against boycotting Israel
States with legal marijuana, inverse compared to the other maps
the airplane exists. waterways have not been the arteries of rapid trade for over a century.
Well, I don't have a map, exactly, but what I will say is that the Balkanization of the United States only happens after it annexes Canada and that the first state to secede is Quebec. Trust me on this, I'm a certified time traveler with a license to meddle with the timeline.
Nobody has any fucking idea at all what it will look like—except that it will be fucking Hell on Earth.
I doubt a proper "Balkanization" would ever happen, too much capital tied up in the US Federal Govt for the hate-bourgeois to ever let that happen.
What you're probably gonna see is states just slowly drifting way legally and economically from Washington. Never fully succeeding, but just disregarding the Federal government with increasing blatancy, beefing up their State Police forces to the point they almost function as a local small military, taking more direct control over their local natural resources, maybe even regulating travel and trade between themselves and other States. The Kingdom will stay intact but the Provincial Lords will gain increasing autonomy.
This will make Red States hell on Earth for a lot of people, but while I don't have any faith in the Dems, more left leaning states may actually become more progressive in response.