US defense officials have emphasized that the agreement supports thousands of jobs across the aerospace supply chain and ensures interoperability with allied forces, warning that reversing course could have long-term diplomatic and economic consequences.

Critics of the US response argue that Canada has the right to reassess major military spending decisions, especially as global security threats evolve and domestic budget pressures grow.

For now, Canadian officials have not announced any formal cancellation, and negotiations remain active behind closed doors. Defense analysts note that similar reviews have occurred in the past without derailing the program, a point highlighted in a recent analysis of the F-35 program.

Whether the US warning escalates into concrete action remains unclear, but the episode underscores rising tensions over defense spending and political leverage between close allies.