Well he said he wanted to instigate a tariff war so that middle class Americans can pay higher prices for gooods. Then he is going to use his dictatorial powers to make American companies bring their operations back to America while he still has operations overseas.
A 20% tariff is a 20% guaranteed profit margin for any company willing to repatriate production. Greed will bring back manufacturing to the USA, just like greed made corporations seek the cheapest stoop labor from all over the world. Greed cuts both ways. Anyone making product would kill for a 20% profit margin.