As much as I'd like manufacturing jobs to come back, it's not the low paying assemble folks that hurt that.
It's like others have raised, the automation assemble tools that we in America just don't have the companies and skills to make like we once did. If you are an American company where do you have to (almost) go to get such automated equipment made? For the years I was in manufacturing. US contractors worked to create such equipment here. Then little by little, a non critical mold was sourced from China and they'd price it cheap if we ran that tool there. Once you did 10 weeks of non-conforming parts for them to tweak the mold you might get good parts, or pay through nose now to get your mold back here to fix and run! Perhaps we'll have have a 10 spindle automated screw machine, a conveyer line, fixtures and jigs, we had done in-house although it moved because it was so appealing. Yet our machinist hung-on correcting improving their crap as China got better. Next, the box and container folks we work with for years just down the street, who worked just-in-time. Now sure purchasing in bulk now meant a new warehouse location to hold the excess stock of packaging there a cost someone negated. Penny pincher saying so much cheaper (and getting a bonus). Sure savings up front, but now the packaging is marked wrong and unusable... Little by little the whole inter-dependent systems foundation was eroding, the highly skilled jobs gone. You can't just flick a switch and turn it all back on!
All you end-up with (make) is insurrection when you are diluted enough to believe the lies.