I have wondered if the Trump presidency could affect on-demand book publishing companies.
Many of these companies do a lot of the set-up overseas in countries like the Philippines (with whom UA relations are strained now), to take advantage of cheaper labor This may be comparable to tech companies using labor in India or eastern European countries.
Printing, however, is still largely done in the US, because it is relatively light in labor demands and because physical books are then shipped. Printing companies are common in the Midwest, and in the Shenandoah Valley and in Piedmont (like in North Carolina).
Trump is likely to penalize companies who set up new operations in low-labor cost less developed countries (by definition, including China and Mexico, with whom Trump has a fixation, even though China is well developed, with its low wages). I don’t expect him to interfere with operations already outsourced in the past.