During the call, which Trump took from his resort in Florida, he advised the Russian president not to escalate the war in Ukraine and reminded him of Washington’s sizable military presence in Europe, said a person familiar with the call, who, like others interviewed for this story, spoke on the condition of anonymity to discuss a sensitive matter.

Peskov did not immediately respond to a request for comment. After this report was published, the Kremlin on Monday denied the call took place, with Peskov saying it was “completely untrue.”