That means either a) making all clothes way more expensive for Americans, as our standards for labor and compensation are high compared to less developed countries, or b) lowering the standard of living in America such that we're forced to accept less pay for more labor.
Or C) deploying machines to do almost all of it (developing said machines if necessary). Which is more likely to actually happen than either A or B, even though the current regime is making it difficult. It also won't create very many jobs.
I believe this is the actual plan. They're forcing manufacturing back to America where we will automate the jobs out of existence. This isn't about creating jobs, it's about controlling production.