Let me try and explain, in 'electronics' terms, why these tariffs, don't seem like a good idea.
Consider electronic parts, such as resistors.
Here is one example:
https://www.lcsc.com/product-detail/Chip-Resistor-Surface-Mount_YAGEO-RC0603FR-07100RL_C105588.html?s_z=n_resistorsA cheap, 100 Ohm 1%, 0603 resistor. They may have cheaper ones, it just came up in the first page of results.
Price for 10 reels, 50,000 = $ 0.0005 each (even the x100 price is only $ 0.001).
So, TWENTY! per cent (penny), from China.
If my Gizmo, that I make (hypothetically speaking), in the US, sells for $10,000 each, and is marketed world-wide, including China.
It makes great economic sense, to worry (in economics) terms, in these $10,000 widgets, and the $10,000 per sale they bring in, both selling it to US clients and clients around the world.
But these $ 0.0005 0603 resistors, DON'T need to come from, or be made in the US. Forcing that to happen, when they can be bought for just $ 0.0005, is just not worth it.
I.e. America should be concerned with producing high value items, such as cars, computers, graphics cards and so on. Which can bring in hundreds or even tens of thousands of dollars per sale.
Whereas petty $ 0.0005 0603 resistors, would be extremely difficult (I think), to economically make in America.
Yes you could make them, but at $ 0.0005 each, and still make a decent profit. Being able to pay the (probably) much higher over-heads in America, not (polluting) turning the rivers green and paying the workers, decent (western) salaries.
I could be wrong, but I think just renting the space needed to make those resistors, in America, could be way over the $ 0.0005 per resistor. Unless you can sell them at crazy high volumes.