But it would never succeed in the first place.
The precedent has already been set. If a State attempts to secede, it will be militarily conquered, a military government put in place for a decade, those who promoted secession not allowed to hold office, their votes not counted.
This would be followed by putting through Constitutional Amendments to solve the original problem...
Hmmm... Maybe a #Calexit *attempt* would solve a lot of problems...
I thin we are all aware that Lincoln screwed up big time. There will be no war over secession, ever again.