The blue states will borrow massively from the red states, slowly raising taxes as their debt grows. The rich will take their money and move to another country. Unemployment will skyrocket so the blue states will make it illegal to fire anyone, most businesses will either go bankrupt or stop hiring. Then the blue states will nationalize those businesses. Many will try to immigrate to the red states only to be turned away by border security. The blue states will then go to the UN to complain about the red states making it too hard for the blue states citizens to illegally immigrate there.