In a surprise coup, the libertarian movement in the US managed to sneak a bill through congress reverting the US Government to being dictated by the Articles of Confederation!
Suddenly, the 50 states will have to ratify whether they wish to remain in the union. It is widely expected that the 26 states currently challenging ObamaCare will quickly push this through. California seen becoming it's own nation.
Seriously, I do wonder where the United States would be had this remained the defining governance model for the country...