Perhaps but the leftists of the world would just LOOOOOVE the United States to be broken up. In fact among the EU elites they look at the united states as if it was literally still nationstates united, even in this day and age. They can't figure out how their parlimentary central government can't take federal control of the members.
I believe the founding fathers have always envisioned the Republic. Consider how the Feds speak for all with ONE unifying voice. There is no california ambasador in Saudi arabia. There is no Michigan currency.
Does anyone remember what the USSR did to America in the old miniseries AmeriKa? Broke the states up. A john kerry wet dream if republicans gain vetoproof control.
Prior to FDR, there were different currencies. To print notes, one needed to be a member of the National Association and have sufficient reserves in legal tender.
http://www.friesian.com/notes.htm