Trump and Putin Set to Discuss Ukraine War in High-Stakes Call

President Trump and President Vladimir V. Putin of Russia are expected to speak Monday about the war in Ukraine, in a highly anticipated telephone call that comes amid a flurry of diplomatic activity aimed at resolving the three-year old conflict.

The call, which Mr. Trump said would take place at 10 a.m. Eastern, would be the second publicly acknowledged phone conversation between the two men since the American president’s second term began. The first call, which took place in February, was celebrated in Moscow as a sign of weakening Western resolve to isolate and punish Russia for its invasion of Ukraine.

“Hopefully it will be a productive day, a ceasefire will take place, and this very violent war, a war that should have never happened, will end,” Mr. Trump wrote on Saturday on his social media platform, Truth Social.

Mr. Putin’s spokesman, Dmitri S. Peskov, confirmed the planned call and said that the Kremlin is grateful for U.S. diplomatic efforts. The compliment was the latest example of attempts by both Russia and Ukraine to sway Mr. Trump with flattery and effusive language.

“If the political services of the U.S. — which we highly value and are grateful to the American side — if they actually help us reach our goals with peaceful means, that would indeed be preferable” to the continuation of the war, Mr. Peskov told Russian state media on Monday.

Mr. Trump took office in January promising to bring a swift end to fighting in Ukraine, but soon encountered the deep, seemingly irreconcilable differences between the warring countries. Mr. Trump has turned to a combination of threats and inducements — most of them unfulfilled — to get Russia and Ukraine stop fighting. But both sides believe that time is on their side.