WASHINGTON, D.C.: A quiet shift inside the Trump administration has stalled a key diplomatic initiative aimed at pushing Russia toward peace talks with Ukraine.

According to three U.S. officials, a working group formed earlier this year to explore ways to increase pressure on Moscow has been quietly shelved — a casualty of dwindling presidential interest and sweeping staff changes.

Set up by high-ranking members of the White House National Security Council (NSC), the group included officials from the State Department, Pentagon, Treasury, and intelligence community. Its mission was to craft strategies for tightening the screws on Moscow and boosting U.S. leverage in negotiations. However, the group lost momentum by May, as President Donald Trump grew increasingly disillusioned with the pace of progress.

"It lost steam toward the end because the president wasn't there," said one U.S. official familiar with the matter. "Instead of doing more, maybe he wanted to do less."

The group's demise, which has not been previously reported, adds to growing concern in Europe about Trump's approach to Russia, particularly ahead of a key NATO summit this month. On June 16, speaking at the G7 in Canada, Trump repeated that removing Russia from the old G8 alliance had been a mistake.

The final blow came about three weeks ago when most of the NSC's Ukraine team was dismissed in a broader White House shake-up. Among those removed was Andrew Peek, the top NSC official for Europe and Russia.

Though it's unclear who ordered the effort to halt, officials say the scale of NSC personnel cuts made its continuation impractical.

While the group never finalized its recommendations, officials say ideas on the table included economic deals to loosen post-Soviet countries' ties to Moscow, covert operations, and incentives for Kazakhstan to enforce sanctions better. The Kazakhstani embassy in Washington did not respond to a request for comment.

The working group had emerged in March or April as some of Trump's advisers began questioning Putin's willingness to deal and hoped Trump might shift to a tougher stance.

In late March, Trump told NBC News he was "furious" and "pissed off" at Putin's comments about Ukrainian President Volodymyr Zelenskiy. An April 1 NSC statement to Reuters cited "deep frustration with the Russian government over negotiations."

But frustration eventually gave way to fatigue. Despite campaign promises to end the war on "day one," Trump has grown increasingly doubtful about his ability to deliver. Officials say he has recently floated abandoning U.S. mediation efforts altogether.

Meanwhile, Trump has seen little success in other peace efforts, including in the Middle East, where tensions have escalated sharply between Iran and Israel. A March Reuters report also revealed that parts of the U.S. government had suspended work on countering Russian disinformation and sabotage.

The White House, Treasury, Pentagon, State Department, and the embassies of Russia and Ukraine all declined to comment.