News brief
Friday鈥檚 decision came after what the president called 鈥渉ighly provocative statements鈥 by former Russian President Dmitry Medvedev. Mr. Medvedev and Mr. Trump has feuded online in recent days. The impact on U.S. nuclear subs 鈥 which normally and routinely patrol global hotspots 鈥 remains unclear. But the move potentially escalates tensions between Washington and Moscow at a delicate time, as Mr. Trump threatens new sanctions in an attempt to push Russia toward a ceasefire in its war with Ukraine.