Just a few months into Olga Stefanishyna's job as Ukraine's ambassador to the U.S, she is helping negotiate a peace deal that could end Russia's war on Ukraine.

The Russians shared the paper, which outlined Moscow's conditions for ending the war, with senior U.S. officials in mid-October, following a meeting between U.S. President Donald Trump and Ukrainian President Volodymyr Zelenskiy in Washington, the sources said.

Russia is threatening to reject President Donald Trump's Ukraine peace plan unless "key understandings" from his Alaska summit with President Putin are upheld.

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.

Belgian Prime Minister Bart De Wever said the European Union's plan to use frozen Russian state assets to fund Ukraine could endanger the chances for a potential peace deal to end the nearly four-year war.

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 U.S. Army secretary, Daniel P. Driscoll, is in the United Arab Emirates for scheduled meetings with a Russian delegation about President Trump’s latest plan for peace in Ukraine, a U.S. official said.