After decades of cheerfully deindustrializing and giving up the source of ordinary people's prosperity, the US is waking up to the stupidity of doing this. It's very visible in the chip industry because it's very visibly dominated by just a couple of firms and because a large range of seemingly simple things can not function without sophisticated integrated circuits.

Alternative interpretation: they are trying to undo the total idiocy that was putting all your microchip eggs in one basket. It doesn't matter how cost-effective it is to centralise production, if the result is that the production capability for the single thing we need the most to continue our lifestyle (high-performance integrated circuits), is in peril from a natural/man-made disaster occuring in a small geographical area.