A company that does not move to cheaper labour will go bankroupt and a new all China company will simply take over. So you have unemployed anyway.
The typical solution to this is that you start walling of these industries with tarrifs or to subsides.
What you eventually have is a huge sector of the US economy that lives of the higher prices and/or taxes of the rest of the population while everybody has lower standards of living.
Once China started institutional reforms there were only two possibilites, these jobs were payed for by other americans or they go away.
Also, most americans only had these jobs because the US was able to export lots of these manufactures.