If companies are limited in what they can import from cheap-labour countries, then they can just bring the manufacturing here and automate the hell out of it so that labour costs are minimal. "Rejigging of trade" need not equate to a significantly higher standard of living for Americans in those particular state.
I found this recent election interesting because of two things that were not talked about my the candidates. One was any kind of awareness that automation is changing . Both candidates uttered similar promises of job growth, and Trump offered bringing factories back as an employment panacea, as if this were 1986 and not 2016. Perhaps both candidates thought that offered a longterm vision would just cost them support when so many voters wanted comforting and nostalghia instead of a sober look at the future.
(The other was religion. In previous elections, at least one if not both major-party candidates had to position themselves as men of faith, show they were well-known to a particular local congregation, etc. This time, neither Clinton nor Trump even bothered making a pretence of that. Just goes to show how religious observance in the US has dwindled, even if evangelicals are still a major voting bloc and, bizarrely, were often more pro-Trump than anti-Clinton.)