TSMC can shut the fabs down whenever they want. If the US think they can take over a fab like it's a t-shirt factory and keep it running without TSMC's cooperation they are sorely mistaken. What are you going to do when none of the Taiwanese workers turn up for work, or worse they do turn up and sabotage the fab.
If you don’t think the US security apparatus will come up with a reasonable plan for doing just that within 2 months of it opening, I don’t think you’re thinking hard enough about this.
> What are you going to do when none of the Taiwanese workers turn up for work, or worse they do turn up and sabotage the fab.
You’re going to offer them a lot of money, citizenship, and exfiltration of their family to turn up at work, and threaten them with lifetime in supermax if they sabotage anything.
What US judge isn’t going to allow you to do what the hell you want under national security provisions if it comes to that?
Of course you’re right, but it’s a hell of a lot easier than when the fabs are located exclusively in Taiwan.