Earlier on Wednesday, Trump's Defense Secretary, Pete Hegseth, said a return to Ukraine's pre-2014 borders was unrealistic and the US administration did not see NATO membership for Kyiv as part of a solution to the war.
US President Donald Trump has said he and Russian President Vladimir Putin have agreed to begin "negotiations" on ending the Ukraine war.
"We have also agreed to have our respective teams start negotiations immediately, and we will begin by calling President Zelensky, of Ukraine, to inform him of the conversation, something which I will be doing right now," Trump said in a post on his social media platform.
Speaking at a meeting of Ukraine's military allies at NATO headquarters in Brussels on Wednesday, Mr Hegseth delivered the clearest and bluntest public statement so far on the new U.S. administration's approach to the nearly three-year-old war.
But we must start by recognising that returning to Ukraine’s pre-2014 borders is an unrealistic objective," Hegseth told a meeting of Ukraine and more than 40 allies at NATO headquarters in Brussels.