European leaders met in London to formulate a plan to help end the war in Ukraine. But even potential peacekeepers face political and economic hurdles.

European leaders sought to assemble what Britain called a “coalition of the willing” to secure Ukraine after any US-brokered ceasefire, as they gathered in London to coordinate defense spending hikes amid concerns of an American pullback.

"Not every nation will feel able to contribute," British Prime Minister Sir Keir Starmer said during a press conference on Sunday.

President Donald Trump, from left, speaks while signing an executive order as Commerce Secretary nominee Howard Lutnick, Rupert Murdoch and Larry Ellison, chairman and chief technology officer of Oracle Corporation, listen in the Oval Office of the White House, Monday, Feb. 3, 2025, in Washington. (AP Photo/Evan Vucci) AP

President Trump will hold a meeting Monday afternoon on the next steps regarding the crisis with Ukraine, including a possible suspension of U.S. military aid, a U.S. official and a source with knowledge of the meeting told Axios.