I visited their fab in Israel. Amazing place and they are Israel's top high tech employee.
This is highly technical, high R&D stuff. Only their fabs in the US and a few other places (Israel, Ireland) can do that. But, in Israel they get preferential tax treatment (because otherwise they will leave and go to Ireland or the US).
So I wonder what would have happened had Trump not been president, or alternatively, what tax breaks he promised.