For the U.S., this is a potential disaster. If China marches into Taiwan, the U.S. will be left with no advanced-node manufacturing and it will have lost the technology race. It would take at least four to six years to recover, and by that time China would own the market. This is very scary for the U.S., which needs to develop AI chips at the most advanced nodes because density equals more accelerators and other types of processing elements. Even that isn't enough, which is why companies developing AI chips are stitching together chips that are larger than a single reticle. (https://semiengineering.com/the-risk-of-two-supply-chains/)
It goes further than that, too. The DoD needs AI chips, too. In the past, the DoD relied on older nodes. That's changed because it needs transistor density for AI. More MACs equals more performance. On top of all of this, TSMC owns the bulk of the fabless market. So this will happen. The big question is who's funding this move.