“Jobs went overseas and union membership declined.”
Manufacturing in the right to work states of the southeast was also devastated by the free trade agreements of the past 25 years. Very few of those factories employed union workers.
US Manufacturing Jobs actually increased in the years after NAFTA.
Government Regulations (EPA, etc.), Business-Busting Lawsuits and Race-Based Politics have all played a role in killing American jobs, as well. See my post above regarding the effects of unions in RTW states.
Plus, we shouldn't overlook John Holdren's (Obama's Science Czar) comment that the goal is to "De-develop America".
De-develop America?
I think I hear the sound of more jobs leaving.