The writer is the author of ‘Chip War’ “I’m a little bit nervous,” admitted CC Wei, the CEO of Taiwanese chipmaker TSMC, taking the podium at the White House this week as he announced the largest foreign investment in American history.

Taiwan is under constant threat of Chinese invasion—something that could become more likely now that America has its own supply of computer chip components.

Enforcing the tariffs on Taiwan would be difficult, and they wouldn’t necessarily be enough to meaningfully increase semiconductor manufacturing in the United States, experts told WIRED.