Russia’s foreign minister rejected ideas floated by members of the Trump transition team for negotiating a ceasefire in Ukraine, casting doubt that the president-elect will be able to negotiate a peace deal in his first 24 hours—as he repeatedly claimed on the campaign trail.

Earlier reports from the Wall Street Journal indicated that Trump’s team is considering a plan to delay Ukraine’s NATO membership by at least 20 years in exchange for continued Western arms supplies and the deployment of European peacekeepers to monitor a ceasefire.

Russian Foreign Minister Sergey Lavrov on Monday rejected proposals floated by President-elect Trump’s allies to end the war in Ukraine, dealing a major setback for the incoming president’s hopes to freeze the conflict.

Russia has firmly rejected a reported peace proposal from President-elect Donald Trump’s advisers that included delaying Ukraine’s NATO membership by two decades and deploying European peacekeepers to establish a demilitarized zone.