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by quirkot 1639 days ago
The entire US physically cannot have one big blackout. There are 3 separate interconnects: East, West, and Texas. There are DC ties which connect them, but even if the tie was left open it's not enough to cascade the blackout.

To your larger point: sure if power was out over large swaths of the US for weeks on end, things would be difficult. But the power outage wouldn't be the problem, the problem would be whoever is causing the power to keep going back out (or the radioactive fallout from a nuclear war in the EMP scenario)