One thing not mentioned is concerning the imported manufactured goods.
If a foreign supplier is heavily subsidized by their national government, which also heavily restricts US made products from being sold in that country, then I believe they have no right to sell their goods here.
For the US, getting rid of some of the highest corporate taxes was step one. When foreigner’s goods are not taxed like ours it only encourages our manufacturers to set up shop overseas. But foreign governments can’t block our stuff while massively pushing their products on us. This is the level playing filed Trump is on about.
Increased use of robots and computers as well as 3D manufacturing becoming common is going to result in fewer jobs in this sector over time. The good news is there is no reason why mostly or completely automated factories can’t be built right here in the US so at least we won’t be dependent on imports.