The ‘Donroe Doctrine’, Now Pointed at Canada

Trump has just put Canada on notice, accusing its regulators of blocking certification of American-built aircraft while continuing to benefit from U.S. aviation support. His response was immediate and explicit: if U.S. planes are shut out, Canadian-built aircraft will face tariffs and decertification in the United States.

This isn’t really about aeroplanes, it’s about leverage and reciprocity.

Trump is using regulation as a tool to dismantle protectionist games and economic sabotage, even when it comes from “friendly” neighbours.

The message is broader than Canada. The Western Hemisphere is no longer an open marketplace for manipulation or outsourced advantage. Access now comes with conditions: fairness, reciprocity, and alignment.

This is the Donroe Doctrine enforced through trade, certification, tariffs, and industrial policy.