Donald Trump on Wednesday broadcast Vladimir Putin ’s warning that he’ll retaliate against Ukraine for its recent stunning drone strikes deep inside Russian territory, the clearest signal yet that the US president’s peace efforts have stalled. Posting on his Truth Social platform after he said the two men spoke by phone, Trump made no reference to additional sanctions or his repeated calls for a ceasefire, which Putin has ignored, or a potential meeting between leaders, which Ukraine’s Volodymyr Zelenskiy said he supports.