If I can't have everything that I want, I'm going to break it and make sure that nobody else gets anything.
The US military is far more politically conservative than the average bear. If ordered to fire upon civilians in a nationwide uprising you'd see military folks defect in droves to the conservative side--this would be especially true of national guardsmen who would refuse federalization in big numbers.
If I can't have everything that I want, I'm going to break it and make sure that nobody else gets anything.
Been there. Conservative or not, troops tend to obey their orders. If ordered to suppress an insurrection or rebellion, they WILL supress it to best of their ability. The first Civil War was bad enough. A civil war with modern weaponry does NOT bear thinking about.
At best we would forfeit our status in the world. The damage to our infrastructure would be immense. We might even get invaded by Mexico and the UN. We would not be better off after the war.