The ongoing Russia-Ukraine conflict and NATO's requirement for unanimous member approval remain the dominant barriers to accession before 2027. Allies reaffirmed long-term support at the 2026 Ankara Summit and through subsequent pledges, yet no Membership Action Plan or invitation has advanced, with several governments citing the active war as incompatible with Article 5 commitments. Recent diplomatic and military aid increases have focused on immediate defense rather than enlargement timelines. Trader consensus reflects these structural hurdles, including alliance divisions and Russian opposition. Late shifts could occur only through a swift negotiated ceasefire, altered allied positions, or formal invitation by late 2026, though such developments lack current momentum.