Think what would happen if those energy rich, agriculturally rich, non-union states that I mentioned left the union and took their tax money with them. These are states that produce real wealth in the form of energy and food. They produce lots of it and they produce it cheaply. What happens to the other areas of the country if they have to, in essence, barter for that energy. What do they have of value to trade? Just asking.
And they would continue to do so.
The US dollar is supported by the productivity of the taxpayers and the full faith, credit, and taxing power of the US government.
And it would continue to be.
So, what do the eastern states in particular produce that contributes to the value of the dollar?
I'd suggest you check the breakdown of GDP by state. Nine of the ten largest state economies voted for Obama last year, Texas was the only exception. The wealth is there, and the goods need to be purchased.