

For Canada and Mexico and tarriffs in general. We need to bring manufacturing back to America and revitalize the rust belt.
For Canada anyway, there is a manufacturing trade surplus in favour of US. Canadians buy more autos than they make, and also provide affordability for US made products, through components. So it means a reduction in US manufacturing jobs, when better products are available from less hateful countries, and US made goods are too expensive for Americans.
I think your point is, first the tube socks go to $20. Then someone (maybe a Chinese who is now global expert in sock making) in US figures out a way to make them for $19, 2 years after their investment.