Donald Trump privately urged Ukraine to strike targets deep inside Russia, including Moscow, if supplied with advanced US weapons, signalling a pivotal policy shift in the war and raising stakes for Nato and Kremlin escalation.

Bolton told Newsweek that Trump's pursuit of a Nobel Prize has clouded his foreign policy, particularly on the war in Ukraine.

President Trump said that he's disappointed with Russian President Vladimir Putin, but that he's "not done with him" during an interview on BBC News, a CBS News partner. On Monday, Mr. Trump threatened tariffs targeting Russia if a peace deal with Ukraine isn't reached within 50 days.

President Trump asked Ukrainian President Volodymyr Zelensky whether Kyiv was able to hit Moscow and St. Petersburg, according to a senior Ukrainian official familiar with their exchange in a July 4 phone call.

Will Vladimir Putin back down? What should Trump's next move be? And what does the future hold for Ukraine? Newsweek contributors Daniel R. DePetris and Dan Perry debate: Daniel R