Trump has touted Friday's summit in Alaska as a chance to get a breakthrough but Zelensky's likely absence from the talks and repeated rejection there can be any land swaps have added to doubts that any genuine diplomatic progress can be made.

Ukrainian President Volodymyr Zelenskyy claimed on Tuesday that Russian President Vladimir Putin is preparing for "new offensive operations."

President Trump says he expects to know quickly if a deal can be made with Russian leader Vladimir Putin to halt the war in Ukraine.