Laws included in trade deals protect US companies’ rent extraction schemes and stop us from fixing or improving our own devices — from phones and tractors to insulin pumps. Repealing them will save billions and hit Trump’s donor class.

Repealing anticircumvention laws would allow the world’s small tech companies to make — and export — tools that “jailbreak” tractors, printers, insulin pumps, cars, consoles, and phones. We could end the perverse system in which a euro, dollar, or peso spent on a locally made app goes on a round trip through Cupertino, California, and comes back 30 percent lighter.

Domestic firms could export jailbreaking tools for printers to support third-party ink cartridge sellers — breaking the grip of the printer-ink cartel, which has driven prices higher than $10,000 a gallon, making ink the most expensive fluid a civilian can buy without a permit.