If a large bloc of countries sanctioned the US together, to the point that sanctioning back would just be suicide, then maybe that could work.

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Sanctions + no travel visas seems most realistic

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We don’t want war, no fly zone would be terrible for foreign business, no country would dare sanctions because it would effect the global economy, power grid sabotage would be hella illegal, so sadly nothing unless they get a really good plan that doesn’t effect their country

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The US produces enough to sustain itself without trade (albeit with a noticeable drop in quality of life) so I'd think it'd have to be war or infiltration but even still, our economy is war based so you might end up strengthening it. Lengthened sanctioning plus warfare might work well in the same way siege warfare did back in the day, but even still is a risky bet considering we have a ton of nukes.

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Nothing. With one Executive Action, the President can set enemy nations back to the Stone Age: prohibit American companies from operating in adversary countries. VISA credit cards would stop working. So would ATMs, which use American technology. Boeings and Airbuses both use American components. So no planes. No Nvidia chips. No iPhone (or Android).

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Nothing. Because they’re too reliant on us and they know it.

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