The United States has chosen not to co-sponsor a proposed United Nations resolution marking three years since Russia's invasion of Ukraine, a move that signals a potential shift in Washington's stance, three diplomatic sources told Reuters. The resolution reaffirms Ukraine’s territorial integrity and condemns Russian aggression.

This decision reflects growing tensions between Ukrainian President Volodymyr Zelenskiy and U.S. President Donald Trump, whose administration has engaged in talks with Moscow without Kyiv’s involvement and is pushing for a swift resolution to the conflict.

The draft resolution, backed by over 50 nations, condemns Russia’s actions and upholds Ukraine’s sovereignty within its internationally recognized borders. In previous years, the U.S. had consistently co-sponsored similar resolutions. However, a diplomatic source confirmed that Washington has so far declined to do so this time.

Russia, which now controls approximately 20% of Ukraine, continues to make territorial gains in the east. While Moscow justifies its actions as a response to Ukraine’s NATO ambitions, Kyiv and its allies see it as an imperialist land grab.

The resolution could still move forward without U.S. support, but its ability to secure broad backing in the U.N. General Assembly may be affected. A second diplomatic source noted that the U.S. position could still change, but for now, American officials have opted to withhold endorsement. Meanwhile, efforts are underway to secure backing from other nations, including those in the Global South.