Trump's message is said to have been conveyed in a phone call on Monday, where, among others, Ukraine's President Volodymyr Zelenskyj, France's President Emmanuel Macron, Germany's Chancellor Friedrich Merz, Italy's Prime Minister Giorgia Meloni, and EU Commission President Ursula von der Leyen participated.
The perception is in line with several leaders' image of Putin - but it's the first time they've heard Trump say so, sources with insight into the conversations report.
During the election campaign last autumn, Trump a quick end to the invasion war in Ukraine, which has been going on for over three years. And after taking office, he said he sincerely believes that Putin wants peace.
But Monday's two-hour-long conversation with the Russian president, which took place after Putin declined a meeting with Zelenskyj in Turkey last week, seems to have made Trump change his mind.
This is not my war, Trump said to reporters after the conversation with Putin.
We are stuck in something we shouldn't be involved in.