The authors of the articles likely weren't anticipating the U.S. to start a trade war with China and implement protectionist measures that involve waiving tarif

The authors of the articles likely weren't anticipating the U.S. to start a trade war with China and implement protectionist measures that involve waiving tariffs to specifically incentivize Apple to maintain manufacturing in the USA: "The US manufacturing of Mac Pro is made possible following a federal product exclusion Apple is receiving for certain necessary components." What I wonder is whether or not this is sustainable moving forward or only intended to be a temporary "win" to create headlines. And can any company that wants to manufacture in the U.S. avail themselves of "federal product exclusions"?