**Trader consensus at 98.8% against a U.S. invasion of Mexico in 2026 reflects the absence of congressional authorization for military action, sustained bilateral security cooperation, and firm Mexican assertions of sovereignty.** Despite repeated Trump administration rhetoric targeting cartels designated as terrorist organizations, relations have shifted toward expanded intelligence sharing, joint training exercises approved by Mexico’s Senate, and counternarcotics coordination without U.S. combat forces on Mexican soil. Recent developments include Mexico authorizing limited U.S. troops for training in Chihuahua, deepening agency ties, and advancing trade talks under USMCA frameworks, with officials shelving earlier airstrike considerations. High domestic political costs in both countries, international legal norms, and the economic interdependence of North American supply chains further anchor expectations against any territorial offensive by year-end. Unlikely triggers for reversal remain a sudden uncontrolled border crisis or abrupt policy shift that escalates limited strikes into sustained operations, though structural barriers make such outcomes improbable before December 31.