KYIV, Ukraine: President Volodymyr Zelensky said Friday that Ukraine has to confront the possibility of losing its dignity or risking the loss of a key partner as it figures out how to respond to a US peace proposal to end Russia’s war with his country. “This is one of the most difficult moments in our history,” Zelensky said in a video address to the nation. “Currently, the pressure on Ukraine is one of the hardest.