The damage to an economy will all be to the USA, US farmers have now lost a huge market in China... or how will their farmers now afford the tractors imported?
Watch Tesla et al car sales tank even further...
Countries and their peoples already pissed off with Trump/USA will now avoid their goods, regardless of tariffs.
In my hobby, cycling, i have been considering a Sram - US company - equipped bicycle, not anymore, it'll be a Japanese Shimano one or even an Italian one......
Far more widely & importantly, Sram equipped bicycles are now going to be priced out of the market, a market they were making significant inroads in.... just one example of Trump's either stupidity or corruption... why for example were no additional tariffs announced on Russia???
You bang on about trade deficits, yet the USA has remained one of the top 3 economies in the world.
Trade deficits are a very crude measure of economic success or not eg a poor country export diamonds, wont be buying much from the USA.
Re-shoring wont happen, you tell me how long it will take eg Apple to start up a factory in California, where they would get the chipsets from, the equipment, the skilled staff and with the US in recession, who will be able to afford the now more expensive iphones? and why would they, when this policy may not even last out the year?
Though its affects on the world economy and US relations, will take many years to be rebuilt.
On your claim of 100m 16- 64yo's economically in active..... BS, the average school leaving age is 18, then there is college, which normally takes another 4 years.... SAHM's, the sick/disabled/retirees...