The Ukrainian leader cast doubt on a meeting with Trump in Washington this week, and said he had several questions for the president.

Ukraine’s trove of rare earths and other critical minerals is firmly in the spotlight ahead of a contentious deal that would include U.S. access to the war-torn nation’s valuable natural resources.

President Trump, who had insisted he wanted “payback” for past military aid to Kyiv, suggested President Volodymyr Zelensky would visit Washington this week to sign an agreement, which he called a “very big deal.