Or, if you wish not to use the armed forces as an example, who controls commerce? Can Florida now openly trade with Cuba, yet Texas choose not to? Or China, can California now trade or borrow money from them without approval of other states? What's stopping or regulating the nation beyond a state level?

Although Saudi Arabia is flooding the market with fuel, when that stops, the majority of fossil fuels is coming from the Gulf Coast and Alaska. Does Louisiana, Texas, and Alabama now have to export oil to the northern states? Who's to tell them they can or cannot if there is no government higher than each respective state?