I’m writing a TL, where essentially the United States sort of breaks up before the constitution is ratified. New England, New York, and Carolina (NC, SC, and GA) break off around 1789 and a rump US remains. At some point in the 1910s or 1920s I want these countries to come back together to form like a new US. I also have Texas and an independent Louisiana coming to the table to form this new union. But I’m unsure of what the government structure would look like. I’d assume it’d be a federal presidential republic, given the nature of the other states. However, it will have been nearly 150 years since the constitution was signed and so the government will be different. I know Wilson favored a parliamentary system but I’m not sure if that could really be passed. So really my question is if anyone has any ideas on what a US constitution formed in the 1920s would look like.