Bilateral diplomatic ties, extensive economic integration under USMCA, and ongoing security cooperation on migration and narcotics trafficking underpin the overwhelming trader consensus against a U.S. invasion of Mexico in 2026. No official statements, troop deployments, or legislative actions signal any such intent, while constitutional requirements for congressional authorization and historical patterns of U.S. military engagement further reduce likelihood. Realistic scenarios that could still shift odds include a sudden, verifiable escalation such as a major cross-border terrorist incident or cartel attack directly threatening U.S. territory, though even then procedural, alliance, and reputational barriers would remain substantial.