There are more factories in the US today than there were like 25-30 years ago.
But they only employ 1/3 the workforce. Why? Because we have things called computers, internet, and automated machines that have made manufacturing much more efficient. In fact I believe the US actually manufacturers more product today than at any point in its history ... the issue is most of that doesn't need a ton of people to do that. Efficiency in manufacturing is light years beyond what it was in say 1980 ... just like your iPhone is miles better than the typical phone from 1980 (the idea of portable phone alone would blow people's minds, they'd probably faint at the touch screen/music/games part).
The truth is politicians on both sides lie about this ... but manufacturing is never really coming back on a mass scale (and they know this). If anything it's going to become even more automated even for countries like China.
The irony is I believe a services based economy like the US is actually becoming benefits more from free trade.







