Canadian PM Mark Carney has drawn a red line against Trump’s weaponisation of tariffs, walking away from trade talks over "unacceptable" US demands that threaten Canadian sovereignty. Carney’s "dollar-for-dollar" retaliation, though risky, is deemed the "right thing" by the author, reflecting his belief that middle powers must stand up to great powers. Despite potential economic pain for both nations, Canadian public support for "Buy Canadian" demonstrates backing for Carney's challenge. He is actively seeking new trade partnerships in Asia and Europe, aiming to reduce dependence on the US. This confrontation is a significant test, with Carney pioneering a rare defiance of a superpower.