Even if manufacturers brought jobs back from overseas, who the fuck is going to do them? We already have a labor shortage coming as the boomers are hitting peak retirement and the commander in queef won't let anyone in without money.
Let's not forget the very real fact that exports are a major part of demand. Imports are a big part of supply. It's econ 101. Tarrifs disrupt both. It's... Not a good idea, ever.
It isn't rocket science. Its so dull and dumb it was literally the background to Ben Stein's "Anyone... Anyone...?" Bit from Ferris Bullers Day Off.