The US withdrawal from NATO faces substantial structural barriers under Article 13 of the North Atlantic Treaty and the 2023 Kaine-Rubio statute requiring congressional approval, with no such authorization currently in place. The Trump administration has pursued troop reductions and force posture reviews in Europe, including the May 2026 withdrawal of roughly 5,000 US personnel from Germany and cancellations of additional deployments, while redirecting resources toward the Indo-Pacific. Officials have publicly reaffirmed alliance commitments and advanced a “NATO 3.0” model emphasizing greater European conventional responsibility, with a Pentagon review of deployments due by December 2026. Bipartisan legislation and recent summit statements have further underscored procedural and political constraints on formal exit.