What's really silly is that absolute number of jobs is kind of meaningless anyway - what's most important for day-to-day living is probably closer to the quality of life metrics, even as flawed as they are.
While true, you can't even get the GOP emphatically behind workfare projects at this point, shit as they may be, much less anything less problematic that could increase quality of life metrics. Bit less than half-ish the political spectrum is intent enough on destroying the country's infrastructure and government's ability to help people that jobs are about all that's left at the moment.
I don't think the manufacturing jobs are ever coming back. If the Chinese won't be doing them, robots will.
Oh,
some steel/whatever stuff seems to have been bumping up a bit.
It's just at the cost of dozens/hundreds/thousands of other american jobs for each one that has (on top of all that good will and shit vis a vis increasingly tentative allies and trade partners), and no guarantee for any particular region regardless. It's basically been about the stupidest and most self-destructive way to go about it you could think of that doesn't involve detonating nukes.
Manufacturing as a core economic activity that indefinitely supports increasing amounts of people on a high school or less diploma is permafucked, though, yeah. That's gone and it ain't coming back. It'd basically take nationalizing and subsidizing the manufacturing industry, 'cause that'd be the only way you're going to get companies to both use the methodology that could use that sort of background in appropriate numbers and pay them a living wage without said company getting outcompeted faster than you could blink.
... and if you're going to do that, you might as well just tax the companies a bit more and pay for better education/welfare/investment-in-other-markets/whatever. Be better for everyone involved, probably.