No army in the world including the US could stop a civilian uprising of even a million people who have just rifles and the will to fight. They don't need nukes, tanks, or airplanes. If a large enough percentage of people, say 2% of the population, decided to fight a civil war, the US army/gov would fall in a few months if the rebels knew what they were doing.
It would be a guerilla war. And all of the critical infrastructure in the US could be destroyed in a month. No gas. No electricity. Smaller uprisings would be easily squashed.
Now, would this ever happen? Unlikely. Americans can barely get their fat asses out of bed much less do military operations for weeks at a time. Things would have to get incredibly bad and a leader would have to organize it. But it is possible.
I imagine it more a weakened government (but still with a functioning military) supported by civilian militias backing the government, versus various large and small insurgencies possibly with foreign backing.
No?
They'll use it on the next one then?
No?
The US practially isn't going to use nukes on the US. Its practically not going to use nukes on pretty much anyone.