WASHINGTON—When French President Emmanuel Macron visited Washington this week, President Trump invited him earlier than scheduled into the White House, where the two men talked alone for over an hour.

Trump has horrified European allies with his attacks on Volodymyr Zelenskyy and what critics say is a soft take on Vladimir Putin.

Trump refused to call Vladimir Putin a dictator, as he has described Ukraine’s president, Volodymyr Zelensky, and falsely claimed that the U.S. had spent three times as much as Europe on the war. He demanded that Ukraine sign over hundreds of billions of dollars in revenue from natural resources to the U.S., without mentioning Russian concessions.