This month, Ukraine’s often tumultuous diplomacy experienced a new conflict when U.S. President Donald Trump announced an energy deal with Russia and demanded that Kyiv refrain from attacking Russian oil refineries. Ukrainian President Volodymyr Zelenskyy’s criticism of Washington’s decision has resulted in Trump threatening retaliation and suggesting Ukraine should replace its leader. Ukraine has since encountered difficulties in using U.S.-provided satellite services for military intelligence, heightening fears of a further reduction in U.S. support for war-beleaguered Ukraine. Ukraine's challenge highlights what have become recurrent occurrences: U.S. allies’ vulnerability to their superpower ally’s pressures and threat of abandonment. Ukraine’s vulnerability, however, has partially been offset by the continued support from other U.S. allies. Multiple European countries have increased their aid to Ukraine’s war efforts and have advocated on the Ukrainian government’s behalf to Washington. Ukraine also has advocates within U.S. politics. Bipartisan lawmakers have crit