Sigh..... unions have almost nothing to do with decisions to move
jobs overseas. The connections that are made along these lines are deliberately made to confuse, distract and misinform. The real reason, is that the GOP wants to break up the political influence that unions exercise by well... being unions. Unions are the political counterweight to ulta wealthy conservatives when it comes to political spending. Remove unions and there are not nearly enough blue blood wealthy democrats to counter those on the right. Breaking up unions is all about political influence.
The biggest driver to moving
jobs overseas, imo, has to do with currency rates; the ratio of the dollar to everyone else's money. The dropping of trade barriers, eg 'globablization', is another key factor. It is often just plane cheaper to manufacture something abroad than it is in the U.S. No amount of plunging U.S. workers into welfare wages is going to rebalance that.