US GDP is heavily skewed by high-ticket military equipment
This skew actually makes manufacturing a lot less sustainable in the US.
See, the real reason why China is so dominant at this point is that the supply chains have migrated there. Labor costs, adjusted for productivity, tariffs, shipping, etc. have about reached parity.
So, without a good supply chain, you have a hard time being a manufacturer.
The military pays silly prices for stuff. So that means that a company that sells to the military has a silly price sheet. Which means that they're not an option for a non-military manufacturer to use them as a supplier.
The problem is that too many suppliers are getting a taste of that sweet, sweet military money, and there are no available options for "normal" manufacturers. And then, lights out for an entire line of products that could be manufactured here, but won't be.
If the military budget ever gets slashed, expect a manufacturing comeback.
How do I know this? I'm a manufacturer here in the US, and this happens to us constantly.