I have been pondering a split based on monetary issues.
Let’s say that the printing of worthless money combined with the discovery that our gold reserves are much less than expected or reported leads to hyper-inflation.
In response a state - let’s say Texas - decides to protect their citizens’ finances by issuing a gold based currency that works “side by side” with US dollars. The stability of this new currency leads many to cash out and buy Texas Lone Stars.
The feds get upset and threaten to cut off Federal Aid. The State of Texas decides to confiscate Federal property as financial recompense. The Feds send in troops to secure their “property.”
Things go downhill rapidly from there.
They cannot do that. The US Constitution specifically prohibits a state from producing currency.
If such a thing is attempted, I predict that the power blocks in the North East (and now elsewhere) in whose interests this Federal spending fountain has been gushing for the last century and a half or so, would launch an immediate war through their agents in control of FedZilla.
If you dare expose the Ponzi scheme they have created by their support of borrowing and spending Federal policy, they will attack you with everything they've got, which means everything the Federal Government has, plus the New York based media system.
Things go downhill rapidly from there.
Can you think of one state that already has more active duty military forces stationed in it, than Texas? They are already there.
I think if things are going to go downhill from there, then things might go downhill from there, in a big hurry.