efficient supply chains have fundamentally reduced the ability to be protectionist and have any value at scale. 1 country can't change a global economy. It isn't possible to do what you did in the 1940s in the 2020s. Capitalism will flow like water to the lowest cost for highest return. That lower cost will never be in the US...at least as long as the standard of living in the US seeks to remain what it is, which I don't think anyone wants to reduce. Manufacturing isn't returning to the US. And it makes no sense for it to so long as consumers demand cheap products and producers seek to maintain and grow profit margins. Tariffs just make products cost more for consumers. Even if countries did try and move production within the US, they will be highly-automated in order to reduce the cost as much as possible. US wages are 10x+ wages in Vietnam. It makes zero sense to open a new factory that isn't 95% run by machines.