We'd need a lot more background to discuss this question. What time frame are we talking about? What caused this Balkanization? A failed Constitutional Convention? A CSA victory scenario?
The usa Splits up after the war of 1812 which is this told version of a civil war when the northwest and New England secede New England takes over the maritimes and lower Quebec however the remaining states in the union break up and to add on to the chaos mexico turns into a dictatorship then falls apart and then the usca falls apart canada rebels after brittish Columbia is invaded by russia during the Crimean war and after that point North America except for mist of the Caribbean is basically city states and in relative chaos