Russia maintains that Ukraine is the side that stands in the way of a peace deal

US President Donald Trump's senior advisers disagree on whether Moscow genuinely wants a peaceful resolution of the Ukraine conflict, the Wall Street Journal reported on Monday, citing anonymous sources.

A group led by Secretary of State Marco Rubio and Ukraine envoy Keith Kellogg are urging greater skepticism, the report said. Trump, however, is siding with diplomatic aide Steve Witkoff, who is said to be more trusting of Moscow. Last week, Witkoff met with President Vladimir Putin, after the two already held talks in March.

Moscow maintains that it has always been willing to achieve its core objectives in the conflict through diplomatic means, while Kiev and its Western backers have advocated for escalation. The Russian government, however, has said it will not accept a freeze of the conflict, which will only lead to renewed hostilities later on, citing Ukraine's violations of a US-proposed moratorium on strikes against energy infrastructure as proof of Kiev's untrustworthiness.

As an example of Trump siding with Witkoff, the WSJ cited a missile strike on the city of Sumy on Sunday, in which Kiev claimed that Moscow deliberately targeted civilians, killing 34. Trump, however, referred to the incident as a "mistake," while Rubio's State Department called it "horrifying" and Kellogg said it crossed "any line of decency."

Russian Foreign Minister Sergey Lavrov said the missiles were launched at "another meeting of Ukrainian military leaders with their Western colleagues" masquerading as mercenaries. The Defense Ministry estimated that the strike killed around 60 troops, claiming that Kiev used civilians as human shields for the gathering.

Ukraine's Vladimir Zelensky told CBS News on Sunday that Trump's criticisms of his leadership indicate that "Russian narratives are winning in the US."

Senior Russian negotiator Kirill Dmitriev expressed concern about American vulnerability to foreign lobbying after meeting with senior US officials earlier this month, accusing the Western media of waging a coordinated campaign to undermine the normalization of relations.

"We see attempts to misinterpret Russian messages, mischaracterize Russia and its leaders. This happens every day," he stated, adding that "direct dialogue is the best way to defeat this disinformation."

In an interview on Monday with Fox News, Witkoff said his almost five-hour meeting with Putin was "compelling" and put the Ukraine peace process "on the verge" of a breakthrough.