White House officials are losing confidence that Ukraine will ever be able to take back all of the land it has lost to Russia over the past four months of war, US officials told CNN, even with the heavier and more sophisticated weaponry the US and its allies plan to send. Advisers to President Joe Biden have begun debating internally how and whether Ukrainian President Volodymyr Zelensky should shift his definition of a Ukrainian “victory” – adjusting for the possibility that his country has shrunk irreversibly.