I'm being a bit facetious here, but if the actual plan is to bring back comparatively low-wage, labor intensive industries to the US, then I think high unemploy

I'm being a bit facetious here, but if the actual plan is to bring back comparatively low-wage, labor intensive industries to the US, then I think high unemployment at the start of the process is exactly what you want; otherwise, you will cannibalize existing industries for the required labor, inflating prices for everything. I do not think that doing this is a good idea, especially not at scale, and I believe that the tariff incentives as they currently stand are insufficient to achieve this anyway (but "sufficient" increases to tariff levels are unpalatable and infeasible).