The president repeatedly said on the campaign trail that he would bring an end to the war during the first 24 hours of his second term.

President Trump said on Thursday that a phone call with President Vladimir V. Putin of Russia had not resulted in any movement toward ending the war in Ukraine, adding that he was “not happy” with the conflict grinding on. “I didn’t make any progress with him at all,” Mr. Trump told reporters.

The call with Vladimir Putin came as Ukrainian President Volodymyr Zelensky said publicly he wanted to discuss weapons supplies with President Trump.