President Donald Trump publicly rebuked Russian President Vladimir Putin during his second state visit to the United Kingdom, telling reporters that Putin has "really" let him down over efforts to reach a path to peace between Moscow and Kyiv. The remarks came during a joint press conference with British Prime Minister Sir Keir Starmer, who has been a steadfast ally of Ukraine's leadership. The visit also included the signing of a billion-dollar U.K.-U.S. Tech Prosperity Deal, underscoring the economic dimension of the relationship as Western allies seek to deter Russian aggression.

Trump acknowledged that delivering an end to the war that began with Russia's February 2022 invasion has proven harder than he anticipated, noting that ending the conflict was once presented as an easy task given his personal rapport with Putin. He said the war has resulted in thousands of deaths and argued that Putin’s strategy has been counterproductive for Russia, noting that Russian casualties have risen compared with Ukrainian losses.

His remarks come against the backdrop of a summit he held with Putin in Alaska last August, where Washington sought to forge a cease-fire but left with little progress. The event did not yield a deal, and both leaders offered brief remarks to reporters with no formal press conference or lengthy questions.

Since then, Trump has signaled tougher action against Moscow, pledging to increase sanctions, even as he later tempered that stance. He said sanctions would be unleashed only if all NATO members stop buying Russian oil and impose tariffs on China, framing the policy as aligned with the goal of pressuring Putin toward a durable peace. Kremlin officials responded that Western sanctions have had no effect, a claim that has framed subsequent talks and public messaging.

When asked about current sanctions policy, Trump pointed to tariffs he has recently imposed on India for buying oil from Russia and referred to tensions with China over its support for Moscow's invasion, saying he was willing to take a broader approach but not when allies are funding oil purchases from Russia. He added that he was disappointed some European countries continue to import Russian oil.

Starmer pressed Trump to maintain and intensify pressure on Putin to secure a peace deal that endures, emphasizing that Ukraine needs support now. He said the West would stand with Ukraine from start to finish and highlighted efforts to bolster Ukraine’s defenses and to push for a negotiated settlement that would hold.

Trump defended the United States' role within NATO, noting that member nations are contributing to defense spending targets announced at the alliance's summit earlier this year. He asserted that the United States would continue to support Ukraine and to provide weapons through NATO channels, while acknowledging that much of the equipment is funded by member states.

Observers noted the mixed signals in Trump’s approach to Russia, with calls for stronger sanctions in one setting and a reluctance to escalate unless Western oil purchases are addressed. The dynamic underscores the broader debate about how the United States should balance pressure on Moscow with allied concerns over energy markets and global stability as Kyiv seeks a lasting cease-fire.