Texas Gold
The Texas Gold Bullion Repository was legislated in 2015 and began operations in 2018. Most readers probably never heard of it but in 2018 I immediately recognized it, thanks to my experience with Orlin Grabbe. It's a foundation for a regional/national monetary system and ever since then I've been expecting this...
Other States are figuring it out, there's supporting legislation pending in 15 States. How do you stop a nuclear-armed juggernaut that's been conscripted by extremists?
You turn off its money.