Jabil Manufacturing in the Tampa area.
They build specialty computer products for the government purchased via a General Dynamics division.
They also have assembly plants in Silicon Valley. I do not know who all their customers are, but I know that some US-based computer companies that are large suppliers to federal agencies use Jabil. I am not sure that Jabil is purely a US-based company though; they might very well outsource some of the work to low-wage countries.
Supermicro stock was decimated before this story even hit.
A US designer using communist manufacturers. What could go wrong?
I've been a small-time Supermicro customer for a long time (mid- or late 90s, I think). They build good stuff, nicely engineered to be efficient and feature-rich. Their quality control is a mixed bag; while the hardware quality is pretty good (sheet metal has edges deburred so you don't cut yourself, holes in PC boards are accurate enough so mounting points line up correctly, screws and mounting points are in sensible places), they are not consistent, and things like firmware versions or sudden changes in specifications can be very annoying. They're not Sun or HP, but also not no-name brand motherboard house.
But referring to them as a "US designer" is a bit wrong. The company consists mostly of Taiwanese people, has strong business ties to Taiwan, and also employs a significant number of people originally from mainland China. When working with them, you quickly discover that only a small fraction of their staff speak English. But working with them has always been pleasant (they're friendly, competent, and responsive, even if there is a layer of translation involved), and their products have generally been good for me.
Name a country that isn't doing it, and you'll name a regime that's no longer in power.
Exactly. The only governments that don't use espionage and insurgency are those that are too incompetent, or too poor to afford it. As an example, look at the Grand Duchy of Fenwick: they had neither good intelligence nor a functioning military, and yet ...