Despite trying they could not source all of the stuff for their simple device in the US. And to further make it worse when trying to buy overseas from suppliers not located in china they simply got Chinese stuff drop shipped to them. You can't reverse the decline in industry in a matter of weeks, months or even a few years, it will take at least a decade of hardship to turn that boat around. Contrary to Trumps statements, China will not be paying for the tariffs (during that decade or more), the American people will, that is how tariffs work!
That ship has sailed a while ago Simon. The loss of first hand knowledge with old timers changing fields, retiring, passing away and no one to pass the baton to, has been apparent for quite a few decades now . Manufacturing in America entirely is not just prohibitively expensive, it is just not possible. As others have mentioned over these many many pages, there are quite a few reasons why. Trumps tantrums and wishing it wont make it so.. and anyone who believes trump deserves to just suffer the consequences of this mess long term. 
Yes. we've lost the skills and infrastructure for manufacturing in the West. China no longer has the cheapest labour. Western companies manufacture in China because it has all the raw materials and a skilled workforce.
The explosion of US manufacturing in the early 20th century relied on the influx of immigrant labor, and the manufacturing process (e.g at Ford Motors) was designed for that labor force.
Recent reports indicate that manufacturing now has a labor shortage (I’ve seen estimates of about 500,000 shortage currently, possibly going to a couple of million in a few years).
I doubt there's a labour shortage. I don't know about the US, but when I was unemployed and just wanted a temporary, low skilled job, just to ease me back into work, after a period of illness, I found it hard even to get the most basic of jobs. I was subject to three interviews even for applying for a Christmas job at a toy retailer, which I didn't get because I didn't want to hassle customers and try to sell them cheap plastic bags at the checkout.
It might have been true in the 1950s, but not today. Extensive automation means mass production no longer requires huge numbers of low skilled workers.
I suppose it's plausible there's a shortage of skilled labour, but that's a different matter.
It's also true that in the past companies have offshored manufacturing because it's cheaper, compared to investing in training and automation. Government policies such as higher taxes and environmental regulation, which have moved pollution abroad and made it more costly to manufacture locally have only made things worse.