The requirement "Made in the U.S.A." seems intended to avoid benefiting a country whose policies are disapproved of by the OP. It's a good ethical principle. Now, it should apply not only to the overall unit but to all the parts inside, right?
If so, then the comment above seems like the last bridge to cross for 100% U.S.A.:
https://www.thomasnet.com/articles/top-suppliers/top-resistor-suppliers-manufacturers/#us-based
Or, perhaps, just inquiring with the manufacturer. My guess is that most will say that at least some parts are from objectionable countries, because competing at a price-point requires it.
If so, then the comment above seems like the last bridge to cross for 100% U.S.A.:
Except that the little resistors and transistors, etc, are from off shore.Checking on that might involve looking here:
https://www.thomasnet.com/articles/top-suppliers/top-resistor-suppliers-manufacturers/#us-based
Or, perhaps, just inquiring with the manufacturer. My guess is that most will say that at least some parts are from objectionable countries, because competing at a price-point requires it.