The Southern Hemisphere, after the EMP first-strike escalates into WWIII.
(Pretty sure SIOP says to launch, if our satellites, landline communications and power grid are all taken out by surprise)
You lose your power-grid though, as high-altitude nukes create devastatingly high voltages in the lines.I doubt it would matter that much - hardening against EMP typically adds about 10% to the cost of the electronics in a device, so something like a car would cost a percent or two more. That's pretty trivial in the grand scheme of things.