Stretching out my old North America Watersheds map with a very quick Balkanised America entitled everyone hates New York. Changes: Pre-ACW New York was successful in its border disputes with Pennsylvania and New England and Washington died at the close of the ACW. Because of hatred everyone now had for New York and the lack of a replacement unifier the states went their seperate ways. Several Anglo-Yorkist, Anglo-Washingtonian and Washingtonian-Yorkist wars later the old North West was split up. New York sought a Martime empire in the Caribbean and South America and the much more unified and militant Washington went on a super-Texas style conquering spree in Louisiana against the Spanish, Mexicans, and independent Anglos. The south was broken and fractured by the power politics of NY, Washington, the British and French. New England was pretty much quiet and mercantile but was instrumental in founding the Anglo state of Pacifica in combination migrants feeling the wars of the east.
Map is of the 1940s, Canada, Mexico and Washington are each formidable powers in their own right and entangled in the web of European Alliances, and New York is always up to shenanigans.
Stars are capitals, circles major cities, a nation being filled in by the colour of another means some degree of client state/puppet/weak ally of the filling colour.