First lady Melania Trump addresses an audience of spouses of heads of government on the sidelines of the 80th United Nations General Assembly in New York City on September 23.. Bing Guan/Reuters New York —

First lady Melania Trump hosted world leaders’ spouses on the sidelines of the United Nations General Assembly on Tuesday, announcing the launch of a new coalition on children’s well-being and artificial intelligence safety that she said she hoped they would join.

For one of her counterparts, Trump’s four-minute appearance at the reception marked a critical opportunity for face time with another urgent goal: ending Russia’s war in Ukraine.

Ukrainian first lady Olena Zelenska, wife of President Volodymyr Zelensky, stood near the front of the crowded room alongside dozens of

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