Slavery is a term thrown around lightly but never defined by these folks. If you can find a shirt or blouse made entirely of material produced within our borders and assembled entirely here, go buy it. But you will have a hard time finding it. And who the hell would want it? Probably twice the price and produced by union members who protect their franchise at gunpoint if necessary. Who are the slavemasters in that situation?
The idea that people in other countries should starve (for their own good) because some here have their own agendas and want to prevent free trade from happening is morally bankrupt.