U.S. makes about half of the chips it consumes. But none of them are leading-edge. Which makes me assume that U.S. is about or almost self-sufficient in much older ones. That will hardly help much though.
Happily, at least West produces entire set of tools needed to produce the chips. So Taiwan is just a matter of cost. At higher prices, they will be made elsewhere when needed, in some time - there's no barrier to that.
