Ukraine’s newly appointed defense minister, Mykhailo Fedorov, has a new, grim strategy for winning against Russia’s onslaught: Kill more Russian troops than the Kremlin can send. It’s a goal that could strain Russia at a moment when it is seeking major gains . It could also give leverage to Ukraine in peace negotiations with Russia, which the United States is currently brokering. However, analysts and European officials cautioned that a plan of attrition comes with major caveats, including that