The west coast states would split up and be highly prosperous.
Texas would love to split off on its own. I live in Texas now and its a weird place where people consider themselves so patriotic and yet much more than any other place in America they want to be their own country. They'd turn pretty backwards but they'd be fine as a nation because of all the oil.
The southern red states would turn into dumps. Their politics and lack of wealth without the federal government funding them would slide them back into third world countries. Judging by their politics it is clear the majority in these states already want to be third world. Within a generation a majority of the red states would be the dumps of the continent.
East coast would be fine as they would continue being centers of finance.
The midwest and west would be split up into some mix. Not very many people there. If they split into red and blue the red states like in the south would drift backwards.
Alaska would join Canada. Hawaii would become its own island nation, or maybe it'd join the west coast.
Basically the west coast and mid/upper Atlantic states would be centers of advancement and wealth, Texas would go all in on oil and do well but eventually become a relic as the world moves to clean energy. The red states, especially the south, would be a third world country. The mountain west would maybe stick together and be a tourist/recreation nation. Oh and Florida I think would be on its own and would be a tourist spot for all the rich north east coasters.