Strong economic interdependence through the USMCA trade framework, routine bilateral security cooperation, and Mexico's firm rejection of independent U.S. military operations on its soil underpin the near-certain trader consensus against a U.S. invasion in 2026. Despite President Trump's repeated emphasis on cartel threats, tariff leverage, and occasional unilateral rhetoric, recent developments such as Mexico's unanimous Senate approval of limited U.S. training exercises and ongoing intelligence sharing reflect managed tensions rather than escalation toward conflict. An invasion would require congressional authorization, face major legal and diplomatic barriers under international norms, and risk severe disruption to cross-border trade and migration management. Even amid sovereignty disputes and public polling on perceived threats, no verified military mobilization or war declaration has occurred. Unlikely triggers that could still shift odds include a sudden, large-scale cross-border security collapse or abrupt breakdown in all diplomatic channels, though these remain far outside current trajectories.