The first face-to-face meeting between U.S. and Russian leaders since the 2022 invasion of Ukraine will test President Trump’s promise that he can end the war.

The U.S. president is pushing to end the war in Ukraine, but analysts say the Russian leader could turn a hastily planned meeting to his advantage.

President Trump struck a remarkably unconcerned tone when asked to address the horrors of war, raising questions about whether he has the leverage to convince Vladimir V. Putin to…