Karol Nawrocki said Ukraine has shown a lack of gratitude for Poland’s wartime help, following Volodymyr Zelensky’s warning that a Ukrainian defeat would let Russia "inevitably" move against Poland and deeper into Europe.Nawrocki said he told Zelensky this "in a straight and honest but very polite conversation," and Zelensky replied that Ukraine "has always been and always will be grateful to Poland" during a joint press conference in Warsaw that also touched on Vladimir Putin’s long-term strategy and a reported Russian "ghost fleet" oil tanker in the Mediterranean.