It won't. America will stop being America first.

The US will slowly receded into the periphery, like Britain after WWII. It will grow incredibly more nationalistic between now and then. I think the military interventionism will start receding as well. It will become a tax haven and investment center for the financialization of industry in other countries. US citizen who want revolution will just leave and go to AES countries. As the monsters US capitalism created keep grinding their poor down, the wealthier reactionaries from those countries will immigrate to the US. We'll get some unholy union of foreign born, multiracial striver ghouls from other countries making allies with domestic racists versus a wholly white and affluent liberal enclave. Nobels will have a little civil war as a treat.

As the climate issue becomes the forefront contradiction, the US-World contradiction will disappear. While China and other countries are fighting to save the species, the US will be a joke of a backwater shithole full of diseased and dying royals.