No NATO member has formally exited the alliance since its 1949 founding, and recent U.S.-Europe frictions have not triggered withdrawal procedures under Article 13. U.S. troop reductions in Germany, selective exclusion of allies like the UK, France, and Baltics from Pentagon-led working groups on NATO's future, and tensions over European support in the Iran conflict have heightened alliance strains. European defense ministers from France, Germany, Italy, Poland, and the UK have publicly pledged greater security responsibility while reaffirming U.S. engagement as indispensable. Trader consensus reflects the high procedural and political barriers to exit, with no scheduled votes, referendums, or official announcements indicating imminent departures in the near term.