European officials are drafting a contingency plan to defend the continent if the U.S. exits NATO, WSJ reports.\\nGermany backs using NATO's existing structures for a Europe‑led defence, marking a shift in Berlin's stance.\\nTrump's repeated threats to reconsider U.S. NATO membership and his Greenland claim heighten European security worries.\\nPlan calls for more Europeans in NATO command roles and supplementing U.S. assets, implying a major structural overhaul.