President Trump's administration has advanced reviews of U.S. force posture in Europe, including planned troop reductions from Germany and scaled-back aircraft and naval assets assigned to NATO, citing insufficient allied defense spending and limited support during the Iran conflict. Officials have signaled re-evaluation of relations with non-compliant members while distinguishing continued U.S. nuclear extended deterrence from conventional retrenchment. A 2023 statute requires congressional authorization for any treaty withdrawal, prompting bipartisan legislation to reinforce oversight and block unilateral action. Recent comments from administration figures address withdrawal discussions without confirming exit plans, and Trump stated at the July 2026 NATO summit that the United States would remain in the alliance. These developments frame trader assessments around procedural barriers and incremental policy shifts rather than near-term departure.