Who needs supply chains, anyway?
At what point in its history did the United States become a superpower?
At the end of WW2? The end of WW1? Following the Spanish-American War? Following the end of the Civil War?
I think, and probably many people would agree, that the United States entered the 20th century as already a fully formed superpower.
At the same time it had practically no allies and lived in splendid isolation.
Between the world wars, it helped industrialize the dictatorial Soviet Union - where famines and mass executions were taking place. Companies like Ford, Caterpillar, GE, Hughes, DuPont and others played an absolutely crucial role in making the Soviet Union an industrial giant.
In the same way, during the interwar years, America did a tremendous amount of business with Kuomintang China.
No sanctions. No lectures about human rights. No insistence on "a flourishing free press" or an "independent judiciary" - just cold, hard business that lifted hundreds of millions out of poverty. That's real American power, that makes people respect the country and want to be friends with it.
In the same way, during WW2 itself, it was the relationship between Stalin and Roosevelt that prevented the start of an immediate WW3 that Churchill was clamoring for.
English and French people trying to sell Europe as "indispensable" to the United States, have been running a very successful racket these past 80 years. The fact is that it's not true.
America became powerful in the shadow of Europe, doing business with everyone that was willing.