Trader consensus on Polymarket reflects an 85.5% implied probability against NATO invoking Article 5 before 2027, driven by the absence of any armed attack on alliance territory since Russia's 2022 Ukraine invasion, which has remained contained without spillover to members like Poland or the Baltics. Recent warnings from NATO generals in early April 2026 highlighted potential Russian aggression by 2027–2030, prompting Polish Prime Minister Donald Tusk to question U.S. loyalty to collective defense commitments amid U.S. pressure for higher European defense spending toward 5% of GDP. However, diplomatic efforts, bolstered troop deployments on NATO's eastern flank, and the high threshold for unanimous invocation—requiring clear armed aggression—sustain deterrence, with no escalatory incidents like airspace violations triggering Article 4 consultations beyond rhetoric. A Ukraine ceasefire or hybrid threats below the Article 5 bar could further reduce risks, though direct attacks on Baltics remain a tail scenario.