A new US administration is about to enter office, one that will incentivize companies to build in America rather than overseas. And Apple seems well prepared for that change, as the company has reportedly just expanded its US-based chip production.TSMC Arizona now producing two chips for AppleTim Culpan writes at Culpium:TSMC Arizona has picked up a second Apple product. In addition to the A16 processor for iPhones, which I shared with you in September, the fab is now producing SiPs (Systems-in-Package) for the Apple Watch, according to my sources. This product is believed to be the S9 SiP (Ill be honest, I am a little unclear on this, but Im 99% sure its the S9). Recall that TSMC Arizona is manufacturing at N4 (part of the N5-family of process nodes) while the S9 is made in Taiwan at N4 and is a derivation of the A16, so this would make sense.Adding a single Apple Watch SiP to its US manufacturing may not seem like a big deal. But as Culpan points out, this is just the second chip Apple is producing at TSMC Arizona. Going from one chip to two is, in some respects, a doubling of what the company did before. And Apple will likely tout the move as such in a forthcoming press releaseperhaps after President-elect Trump takes office later this month.Apples expanded US investment likely tied to avoiding tariffsTrumps administration is expected to impose strict tariffs on products being brought into the US from overseas, but Apple hopes to largely be exempt from any such financial burdens.The rationale? Tariffs on Apple, a US-based company, will harm its ability to compete against foreign tech giants like the Korea-based Samsung.That argument largely worked for Apple during Trumps first term, but the company also made moves back then to invest more in US projects than it had before.Todays report shows Apple following that same playbook ahead of Trumps inauguration, and we should expect to see more announcements of US-based initiatives in the years ahead.What do you make of Apple expanding its US chip manufacturing? Do you expect more stories like this to emerge? Let us know in the comments.Best iPhone accessoriesAdd 9to5Mac to your Google News feed. FTC: We use income earning auto affiliate links. More.Youre reading 9to5Mac experts who break news about Apple and its surrounding ecosystem, day after day. Be sure to check out our homepage for all the latest news, and follow 9to5Mac on Twitter, Facebook, and LinkedIn to stay in the loop. Dont know where to start? Check out our exclusive stories, reviews, how-tos, and subscribe to our YouTube channel