The United States has a few chip fabs that are capable of making military grade hardware. It’s helpful that the defense industry uses chips which aren’t the most advanced possible - they want the reliability mature tech provides. Micron, Texas Instruments, ON semiconductor - there are a few domestic chip companies with stateside fabs.
Intel is also a valuable collection of patents and a huge number of companies would love to get them. Someone will want to step in before the government takes over.
Why are there dates in the corners?