Simply put the jobs that left are NOT coming back ...Trump has to create new jobs in those industries if he wants to keep his promise about the jobs to his voters ( doubtful this happens tho )
New jobs in declining industries?
If they make t-shirts here for example or ties, they're going to have to pay people a living wage and not like those prison camps they call jobs in Chile or China. That's already eating up major profit.
Why would a company looking to grow, invest in new labor jobs when blue collar, non degree holding positions are dead ends?
What would they even manufacture now?
Soon they won't even need people to work Amazon warehouses. What jobs can be created?