President Donald Trump’s national security adviser said Sunday that top administration officials will meet with European officials this week about how to end the war in Ukraine, nearly three years after Russia launched an all-out invasion.

Less than a day earlier, the New York Post reported that Trump had a phone call with Russian leader Vladimir Putin to discuss steps toward a negotiated solution. Speaking to reporters aboard Air Force One as he flew to the Super Bowl in New Orleans, Trump declined to discuss his reported phone conversation with Putin.

“I don’t want to do that. We’re trying to end that war. It’s a war that would have never happened if I were president, it would have never happened, but we’re making progress. But I can’t tell you,” he said.

Asked to clarify whether his conversations with Putin took place before he took office or after, Trump said, “I’ve had it. Let’s just say I’ve had it. And I expect to have many more conversations. We have to get that war ended. It’s going to end.”

There was no immediate confirmation of the call by the Kremlin.

In a television interview, National Security Advisor Mike Waltz said the Russian economy is not doing well and that Trump “is prepared to tax, to tariff, to sanction” Moscow to get Putin to the negotiating table. Waltz also underscored that the Trump administration is looking to use this week’s engagements to begin talks on clawing back some of the United States’ assistance to Ukraine. He said European allies also will need to take a greater role in supporting Ukraine going forward.

“We need to recoup those costs and that is going to be a partnership with the Ukrainians in terms of their natural resources and their oil and gas and also buying ours,” Waltz said in an appearance on NBC’s Meet the Press. “Those conversations are going to happen this week. And I think an underlying principle here is that the Europeans have to own this conflict going forward. President Trump is going to end it. And then in terms of security guarantees, that is squarely going to be with the Europeans.’’

Vice President JD Vance will be in Paris on Monday for an artificial intelligence summit that’s gathering government officials and will head later in the week to the Munich Security Conference, where Ukrainian President Volodymyr Zelenskyy will lead the battle-weary country’s delegation. Secretary of State Marco Rubio, Defense Secretary Pete Hegseth and Trump’s special envoy on Ukraine and Russia, Keith Kellogg, will also be in Munich.

Wednesday, Hegseth will join the main international forum for drumming up weapons and ammunition for Ukraine. He’s set to participate in a meeting of NATO defense ministers in Brussels the following day.