President Trump raised the possibility that the U.S. would acquire Ukrainian power plants, including nuclear facilities, calling it the “best protection for that infrastructure,” as the White House tries to jump-start talks to halt the Ukraine-Russia war.

Trump’s proposal during a phone call Wednesday with Ukrainian President Volodymyr Zelensky is a new twist in peace efforts, which included a still-unsigned deal that would give the U.S. rights to hundreds of billions of dollars of rare-earth minerals.