This is completely ignoring the fact that Chinese labor is significantly cheaper than the US as well as the standard of living. No amount of shipping is going t

This is completely ignoring the fact that Chinese labor is significantly cheaper than the US as well as the standard of living. No amount of shipping is going to recover those costs unless you jack up the rates astronomically. Nearly all the supply chains are in Asia. It would cost companies billions to relocate and they would just relocate to other areas where the labor is cheaper and they can get away with working their employees 12 hour shifts. Things like electronics for example would be extremely difficult to switch to a country like the US because there isn't a trained workforce here to deal with manufacturing small components. Plus, they'd be asking to be paid 20 dollars an hour with benefits vs China's probably 12 dollars and no benefits. Also, leaving the UPU is as drastic as the tariff war because all it will do is cause countries to jack up the rates of incoming mail to compensate. Every time the US leaves without negotiation, there's no reason why countries won't retaliate.