Unless they only wanted to show the extent of their power over other nations. A strong signal, I might add. It could also be in the interests of US government to see which countries they control fully, and which put up a fight.

And what possible plan of attack is there for fixing its problems? Voting clearly doesn't work. Violent revolution has about a 0.0000000001% chance of success (if I'm extremely generous). If you could get hundreds of thousands of the right people flooding all aspects of US politics you might have a chance, but that probably has worse odds than a revolution. I can't imagine any possible way to fix the US now.

All we can hope is that they will keep acting insane until the rest of the world simply unplugs from them. We can't stop their power but they can become the "North Korea" continent that we all shake our heads over but realize there's nothing that can be done that would be worth what it would cost.

The US is growing weaker, (and that is not a good thing), I don't see how it will ever export oil, its economy is a disaster, the hole in its public treasury is legendary, etc.

Meanwhile China is growing like weeds.