EXCLUSIVE: Donald Trump Slammed for 'Selling Out Ukraine' to 'Give Putin Everything He Wants'

Criticism has intensified over Trump's approach to sanctions, Russian energy purchases and reported interruptions to American intelligence support for Kyiv.

His administration's apparent willingness to normalise relations with Moscow has also prompted questions about whether potential commercial agreements are influencing its diplomatic priorities.

Another European security source said: "What makes this particularly troubling is the suggestion that economic opportunities with Russia are being placed ahead of fundamental security commitments. Putin has spent years trying to weaken Western unity, and Trump risks delivering precisely that outcome without Russia having to make meaningful concessions."

The source continued: "There is enormous frustration across European capitals. Governments have invested heavily in supporting Ukraine, only to find that Washington may now undermine those efforts. The comparison with Neville Chamberlain is becoming increasingly difficult to ignore."

Chamberlain, Britain's wartime-era prime minister, became synonymous with appeasement after signing the 1938 Munich agreement with Nazi Germany.

Trump's critics argue allowing Russia to retain occupied Ukrainian territory could similarly encourage further aggression and undermine international rules protecting sovereign borders.

European leaders, including French President Emmanuel Macron, 48, German Chancellor Friedrich Merz, 70, and Canadian Prime Minister Mark Carney, 61, face increasing pressure to demonstrate greater independence from Washington.

Concerns extend beyond Ukraine, with European intelligence agencies warning about Russian espionage, sabotage and cyberattacks targeting Western countries.

A Western defence source said: "The consequences could reach far beyond Ukraine's borders. If Putin concludes that military aggression produces territorial rewards, there is little reason to believe his ambitions will end there. Other authoritarian governments will also be watching how the United States responds."

The source added: "Europe cannot continue relying on assurances from Washington while American policy moves in the opposite direction. There are serious discussions about strengthening independent defence capabilities, increasing pressure on Moscow and reconsidering aspects of the transatlantic relationship."

Trump has repeatedly argued negotiations are necessary to end the conflict, while Ukraine maintains any lasting settlement must protect its sovereignty.

European governments continue providing military and financial assistance to Kyiv as Russian forces sustain their offensive and Ukrainian drones target infrastructure inside Russia.