The prospect of Trump returning to power in the United States next year has raised questions about the future of the conflict, as the Republican has been critical of US military aid to Kyiv. Zelensky spoke a day after saying the war will end “sooner” than it otherwise would have done once Trump becomes president.

He also spoke a day after Russian President Vladimir Putin held his first phone call with a major Western leader, speaking to German Chancellor Olaf Scholz who initiated the call despite Kyiv’s objections.

“For our part, we must do everything we can to ensure that this war ends next year. We have to end it by diplomatic means,” Zelensky said in an interview with Ukrainian radio.

There have been no meaningful talks between Russia and Ukraine, but Trump’s re-election has plunged the attritional conflict’s future into uncertainty, with the Republican repeatedly promising to cut a quick deal to end the war.

Russian President Vladimir Putin has said he will only accept talks with Ukraine if Kyiv surrenders Ukrainian territory that Moscow occupies. The Kremlin said he repeated that demand in the phone conversation with Scholz on Friday. Zelensky has rejected Putin’s conditions.

Zelensky said on Saturday that Russian forces were suffering heavy losses and that the advance had “slowed down” in some areas. Ukraine was “at war with a state that does not value its people, that has a lot of equipment, that does not care how many people die”, he added.