The United States has put elements of its longstanding defense cooperation with Canada under strain as a dispute over Ottawa’s planned F-35 fighter jet acquisition intensifies. Washington has warned that if Canada cuts back on, or walks away from, its planned purchase of US-built F-35s in favor of alternatives such as Sweden’s Gripen, it could alter the framework of the binational North American Aerospace Defense Command (NORAD).
The US ambassador to Canada has cautioned that if Canada fields fewer fighter jets than planned, American forces may be required to fly more missions over Canadian airspace, potentially necessitating revisions to parts of the Cold War–era NORAD agreement. He indicated that weaker joint air defense resulting from a reduced or changed fighter fleet could force the United States to assume a larger operational role, with security cooperation coming on more explicitly defined US terms.
According to reporting on the dispute, US officials have also linked the issue to broader defense spending expectations, pressing Canada to present a credible, resource-backed plan to lift core defense expenditure toward a higher share of GDP over the coming decade. The F-35 procurement, already a source of domestic controversy in Canada due to rising costs now approaching $28 billion, has become a focal point in a wider debate over sovereignty, burden-sharing, and the future shape of North American air defense.