WASHINGTON, Oct. 11 -- President Donald Trump said on Saturday that Ukrainian President Volodymyr Zelenskyy "better damn well stop" striking Russian oil refineries, then added: "I think it's time for Ukraine to get a new president." The remarks came a day after Washington eased sanctions on Russian diesel, and Politico described them as a sharp escalation in Trump's criticism of Zelenskyy.

Trump spoke to reporters as he left the White House on the South Lawn, after being asked whether his diesel deal with Moscow would prolong the war. He said, "Zelenskyy could have settled this war many times. Many, many times. And he chooses not to."

He then turned to the refineries. Trump said his administration had told Kyiv, "You can do whatever you...