well if America does ever get that dysfunctional it will essentially mean that there is no American state anymore as the state at it's fundamental level is a body of armed men enforcing the ruling class's will. Warlords are their own body of armed men and if the American can't maintain the state monopoly on violence at that level it is no longer the state

Political power comes from guns if the American state stops having the guns it stops having political power and at that point it doen't exist anymore