Cheap labor is part of it, but the sad reality is that supply chain is entrenched because China embraced manufacturing and US policy abandoned it. I suggested they print domestically. But what are the odds that the paper and inks suppliers would still be in China?

Unfucking this would take decades. IMHO, they should have focused tariffs on finished products and then slide the cutoff down over time. Once you get "assembly" back in the US it opens the doors for domestic companies to start supplying some of the inputs. Then someone can supply those suppliers, etc. The goal being you end up only importing materials that cannot be sourced locally like rare earths. You can't just say "shit costs more now" and expect a Shenzen equivalent to spawn itself in the US.