Donetsk Territorial Dispute Emerges as Key Obstacle in U.S.-Mediated Ukraine Peace Talks

Active diplomatic efforts are underway to resolve the territorial dispute over Donetsk as part of U.S.-mediated negotiations aimed at ending Russia’s war in Ukraine, according to U.S. Secretary of State Marco Rubio. Speaking before the Senate Foreign Relations Committee on Wednesday, Rubio described the Donetsk issue as the central remaining challenge in the peace process, calling it “very difficult” to resolve despite recent progress in narrowing the scope of disagreements.

Donetsk is part of Ukraine’s eastern Donbas region, an area that has been at the heart of the conflict since Russia’s full-scale invasion. Russian President Vladimir Putin has repeatedly insisted that Moscow will take full control of Donbas, including Donetsk, by force if necessary, unless Ukraine agrees to cede the territory in a negotiated settlement. While Russian forces currently control around 90% of Donetsk, Ukraine still holds approximately 20% of the region, covering about 5,000 square kilometers.

Ukraine has firmly rejected the idea of territorial concessions, arguing that it will not “gift” Russia land it has failed to capture militarily. This stance is strongly supported by Ukrainian public opinion, with polls showing little domestic appetite for giving up territory. Most of the international community continues to recognize Donetsk as part of Ukraine, despite Russia’s claims that it belongs to its so-called “historical lands.”

Recent peace talks held in Abu Dhabi included a rare face-to-face meeting between Russian and Ukrainian officials. Although no agreement was reached, both sides expressed openness to continued dialogue, with further discussions expected next Sunday. Rubio noted that the United States may participate directly in follow-up talks, though President Donald Trump’s senior envoys, Steve Witkoff and Jared Kushner, will not be involved.

The Trump administration has reportedly increased pressure on Kyiv to make concessions to bring an end to the deadliest conflict in Europe since World War Two. Rubio also addressed questions about security guarantees for Ukraine, stating that the U.S. position is largely settled, though any guarantees would only take effect after the conflict ends. According to the Financial Times, Washington has linked future U.S. security guarantees to Ukraine’s acceptance of a peace deal with Russia.