It has been almost mentioned in jest that the West Coast states of California, Oregon and Washington could secede from the ' United States'.
They have their own economies, and whilst it looks totally implausible, I would imagine it would receive a lot of support from the residents.
Already many Californians have taken down the star spangled banner and are just displaying the California state flag.
We have to remember that the US is just a hodge podge of very different states with their own laws or interpretation of laws, almost like separate nations who have something in common with the neighbours , but often have completely different outlooks , such as Texas and California.
In general, The East coast and West Coast are liberal and are democratic voting, whilst the ' fly over' states down the middle are more far right and Conservative.
There might not be a traditional ' fighting' civil war, but I can see a trade and political fall out on a huge scale.
You can guarantee that Trump and his deranged acolytes will not lift a finger for any ' blue' state in crisis, and have already blamed California's Governor for a natural disaster.
Definitely something to watch for over Trumps term in office.