Additionally, US politics is now aligning across the aisle against China, and relying too heavily on TSMC looks like a potential future geopolitical problem. Intel is the only firm that can realistically keep up or out-fab TSMC and thus the USG will be loathe to let it even look like it might fail. Simply having fabs physically within your territory but managed by a remote firm, is clearly no substitute for having fabs actually managed by a domestic company (consider how many ways there must be to do the equivalent of SSH-ing into a fab, or otherwise subtly sabotage it from HQ).