A more important question might be: Which manufacturer's profits stay in the US?
I would be willing to bet that not a single manufacturer can claim anything other than 100% Assembled in the USA. I recently left the employ of a very small specialty sporting goods manufacturer...and even we ordered components from China. It is cheaper to buy 10,000 screws and 100,000 orings from China and have them flown in-country than it was to buy the same stateside...and almost as fast.
I would be willing to bet that not a single manufacturer can claim anything other than 100% Assembled in the USA. I recently left the employ of a very small specialty sporting goods manufacturer...and even we ordered components from China. It is cheaper to buy 10,000 screws and 100,000 orings from China and have them flown in-country than it was to buy the same stateside...and almost as fast.