As Washington ramps up its negotiations with Ukraine and Russia and U.S. President Donald Trump expresses optimism that a peace deal could be close, there are still some very critical and contentious issues on which Kyiv and Moscow are in deep disagreement.

Trump's Ukraine peace talks show potential as envoy meets Russian officials, but territorial disputes remain the key obstacle to ending the ongoing war.

The Russian leader said he felt Washington was taking his position into account, but that some things still needed to be discussed when a U.S. delegation visits Moscow next week.

A new U.S. push to end Russia-Ukraine fighting has set off a flurry of diplomacy by American, European, Russian and Ukrainian officials.

Certainly, the latest rounds of American bargaining and pressure on Ukraine are the most substantial yet. “This isn’t another round of what we saw before,” says a Western diplomat in Kyiv. Those close to the talks speak of “serious progress” bringing some Ukrainian and Russian positions together.

The Army secretary, a close friend of Vice President JD Vance, has been newly tasked with helping end the war in Ukraine.

The most consistent thing about Trump’s 10-month search for an end to the war in Ukraine has been his inconsistency.

A push by the Trump administration to end Russia's war on Ukraine appears to make headway, with Kyiv saying Zelenskyy could visit D.C. within days to finalize a deal.