It's not reasonable to retrain this coincidental generation of unskilled undemanded workers, especially not when our nation still has a bad education resource problem. Pedagogical expenditure should go to those who are most likely to experience the largest impact, and that's children. Also because any training program you develop has to work <fast> and <soon>. Also because there are no fast and easy training programs that have high efficacy rates.
Trump and some laborers have talked about bringing manufacturing back to the US. But this is by far the most impossible demand. Tariffs on Mexico and China won't persuade a metaphorical Foxconn to bring a Shenzhen analogue to the US. Shenzhen works because China and the rest of the Chinese people are okay with Shenzhen style workers breaking their back for the rest of the nation, and China can quash any worker malcontent, union, or any collective action.
There's no way that people would be okay with that here.
And with all the companies of the world racing towards robotic labor and domain applied machine learning, the kinds of US manufacturing job growth here will be few, high paying, and highly technical. But these innovations will mean net fewer manufacturing jobs, even as manufacturing may go up.
And the fact that driving is one of the most frequent jobs in most states of the US, and with Uber having made an automated truck delivery of beer recently... there's no way that manufacturing jobs will keep pace with job loss.
These people are screwed without welfare, and after welfare, there's nothing else to be done for them.
They're a $100 barrel of oil in the ground that costs $105 to extract.