How much longer with the "United States" continue to exist as a sovereign entity?

Everywhere we look these days, things are falling apart in the "United" States. The government itself is being dismantled from within and we seem to be witnessing the establishment of a permanent "royalty", an aristocracy based on wealth and power that increasingly ignores the will of "the people". The push is on to keep the masses ignorant and subservient.

Which government services will fail first? Which departments will be shuttered next? Which state or states will be the first to secede? Which major corporations will be the first to pull out of America entirely? What will happen when the flood of climate refugees overwhelms what's left of the U.S. social services?