Officially confirmed US or French nuclear warheads in Poland remain a tail risk. However, a lethal Russian attack on NATO territory or a direct Russia-NATO clash would be the most plausible trigger. Lithuania removing its constitutional ban on nuclear weapons would open the legal path to nuclear sharing there. Basing in Poland would then set a precedent for extending the same posture to the Baltics.
// Cascade Logic
Lethal Russian attack on NATO territory / direct Russia-NATO clash → NATO decides to station nuclear warheads in Poland; Lithuanian constitutional change + Polish precedent → US-Lithuania nuclear-sharing agreement
// Causal Graph
// Causal Links
enablesstrength: 45%shift: 30%
Deaths caused by a Russian attack on NATO soil would remove the political objections in Washington and Paris to forward-deploying nuclear weapons on the eastern flank.
amplifiesstrength: 40%shift: 25%
A direct military confrontation would raise deterrence needs and strengthen Warsaw's longstanding request to host warheads under NATO nuclear sharing or the French deterrent.
enablesstrength: 60%shift: 35%
The constitutional ban is the legal barrier to any nuclear-sharing arrangement. Removing it is a precondition for a signed US-Lithuania agreement.
amplifiesstrength: 40%shift: 22%
Confirmed basing in Poland would set a precedent for forward nuclear posture on the eastern flank. That would lower the political cost of extending sharing arrangements to the Baltics.