Ukrainian President Volodymyr Zelenskiy said US President Donald Trump was exerting undue pressure on him in trying to secure a resolution to the nearly four-year-old war pitting Kyiv against Moscow.

Zelenskiy, in an interview with US website Axios published on Tuesday, also said any plan requiring Ukraine to give up territory that Russia had not captured in the eastern Donbas region would be rejected by Ukrainians if put to a referendum.

Axios quoted Zelenskiy as saying it was “not fair” that Trump kept publicly calling on Ukraine, not Russia, to make concessions in negotiating terms for a peace plan.

“I hope it is just his tactics and not the decision,” Axios quoted Zelenskiy as saying in the interview, conducted by phone as Russian, Ukrainian and US negotiators held talks in Geneva.

Trump has twice in recent days suggested it was up to Ukraine and Zelenskiy to take steps to ensure the talks proved successful. 

Ukraine better come to the table fast. That’s all I’m telling you,” Trump told reporters aboard Air Force One on Monday.

Zelenskiy, Axios said, suggested it might be easier to put pressure on Ukraine than on Russia.

He thanked Trump again for his peacemaking efforts and told Axios that his conversations with the top US negotiators, envoy Steve Witkoff and the president’s son-in-law, Jared Kushner, did not involve the same kind of pressure.

“We respect each other,” Axios quoted him as saying. He added that he was “not such a person” to fold easily under pressure.