I no longer think America has the will to survive.
However, nothing is static. The soft, weak and succulent current generation that might very well lose their legacy will simply begat more desperate survivors. When a hot CW2 gets underway, it will most likely become genocidal.
Have you ever read about the partition of India after the British left in 1948? Millions upon millions of Hindus and Moslems moving east/west to find security among like others in either Pakistan and India.
So too when the battle over who controls the US gets underway. I cannot foresee a situation where it won't result in the forced removal of millions.