How will the American people react
They can move, this is not like earlier where everyone lived at home. If you want you can move anywhere in the world and many areas which you may want to live has nice grocery stores, banks, internet, doctors. You can move a lot of places now that may not be home but its a heck of a lot better than things may be soon in America.
Sadly, you could not be more mistaken. Once America falls, the rest of the world will fall at an accelerating pace. Any move will not be worth the effort, it is a stand and fight proposition.