I really think that's a very likely scenario in the coming decades. For example, I can see Texas exiting the union, and then some red states might follow it. Similarly we could see that happening with California or Florida. As the economic situation keeps getting worse, the domestic political tensions will keep rising, and we're already starting to see rhetoric from both blue and red states that the problems with the economy are the fault of the other side, and if they only weren't burdened by them, then things would start getting better.