>>512303925 (OP)
Majority non-White USA will experience a crisis of competence and will be unable to project power globally. The USA will then lose hegemony and collapse from USD no longer being the world reserve currency. The only thing keeping a heterogeneous society together is the currency. Once the currency is worthless there will be a civil war followed by balkanization. Water from the Colorado River will be cut off during the civil war or after balkanization. Humans can survive only three days without water. The American Southwest and northern half of Mexico will be depopulated.