How did Trump's approach to diplomacy with Russia differ from Biden's approach?

Trump's diplomatic approach with Russia significantly departed from Biden's established protocol. While Biden maintained a consistent practice of coordinating closely with Ukrainian leadership before any communication with Russian officials, Trump reversed this order by speaking first with Putin and planning to loop in President Zelensky afterward. This shift in diplomatic choreography, described as 'highly charged' by the Washington Post, likely upset Kyiv and signaled a fundamental change in U.S. foreign policy. Trump's conversation with Putin, which he characterized as 'productive,' included discussions about initiating negotiations to end the Ukraine war, but did so without prior Ukrainian involvement—breaking from the careful diplomatic balance maintained by the previous administration.