Ukrainian troops may use U.S. weapons to strike targets within Russia wherever Russian forces launch cross-border assaults on Ukrainian territory, not just near the Kharkiv Oblast border, U.S. officials confirmed to Politico on June 20. The officials denied that this was a substantive policy change from U.S. President Joe Biden’s statement granting Ukraine permission to use American weapons in Russia “solely near the area of Kharkiv.” U.S. National Security Adviser Jake Sullivan told PBS News on June 17 that Ukraine is allowed to strike “anywhere that Russian forces are coming across the borde…