Contrary to the promises he made to dupe his followers, there is no way in hell the Republican appointees who will wind up pulling his strings (Pence being the biggest) or the Republican Congress and their country-club masters will allow him to roll back trade.
The factory jobs are not coming back.
The coal jobs are most certainly not coming back (and that has nothing to do with trade.)
Expect another populist in 4 years, and promises which simply can't be kept.