If they employ a digital currency, none of this even matters.
They would have to send no one after anyone, they would simply remove certain people from being able to participate in society.
Couldn't the several States simply issue their own commodity-backed currency? I don't see why not.
It seems a rather straightforward proposition to me - the feds issue currency backed by the rapidly-diminishing "full faith and credit" of the United States, in both paper and computer code, while the States issue had currency in the form of gold/silver/copper or paper backed by commodities like wheat, timber, fertilizer, and LNG from our abundant shale resources etc.
The relative value of the two currencies is obvious. The States could pull that off without too much trouble, driving out the Fed's worthless paper and computer digits.
Where do I err?