No... Some parts of the country will simply become ungovernable if that happens. Only the west coast and the East coast can make it independently as first world economies.. Most of the rest can function internally trading with neighbouring states. But not on the international stage..😷
No, Texas is the only single state that has it's own power grid. Every other power is multi-state shared. Just one example of how it would be logistically impossible to split up the Union.
My honest feeling is there won't be a civil war, because it's already over. There's a group of militant hardasses who distrust the establishment while at the same time pining for the glory of the past world order, where the US was a sole superpower and dominated the military, economic, scientific and cultural shape of humanity. Those days can't come back, and this movement appears to have fallen into the trap of only drawing a small and shrinking demographic of caucasian men, predominantly 60+, basement keyboard warriors who occasionally like to larp, not exactly the stuff that inspires revolution.
The only momentum it has comes from the coopting of the Republican party and its access to power, but this is an unstable arrangement that relies on the focus of a single geriatric billionaire, the rest of the Republican party are politicians, they will go where the votes and money go, and the age group of their current supporters pretty much guarantees they will switch once the base has been milked of all the votes and cash it can muster.
Meanwhile, the real players in the US, the corporations, are all middle or leftwing. They have to be, their employees and customers are a huge mix of identities, so they have to appeal to the biggest set of people unless they want to be a fringe player