US President Joe Biden, left, meets with Ukrainian President Volodymyr Zelenskyy at Mariinsky Palace during an unannounced visit in Kyiv, Ukraine, Monday, Feb. 20, 2023. (AP Photo/Evan Vucci, Pool)

In this photo provided by the Ukrainian Presidential Press Office on Monday, Feb. 20, 2023, Ukrainian President Volodymyr Zelenskyy, right, and U.S. President Joe Biden shake hands during their meeting in Kyiv, Ukraine. Biden has made an unannounced visit to Ukraine to meet with President Volodymyr Zelenskyy. Monday’s visit is a gesture of solidarity that comes days before the one-year anniversary of Russia’s invasion of the country. (Ukrainian Presidential Press Office via AP)

In this photo provided by the Ukrainian Presidential Press Office on Monday, Feb. 20, 2023, Ukrainian President Volodymyr Zelenskyy, background, looks on as U.S. President Joe Biden signs a guest book, at the Mariinsky Palace during their meeting in Kyiv, Ukraine. Biden has made an unannounced visit to Ukraine to meet with President Volodymyr Zelenskyy. Monday’s visit is a gesture of solidarity that comes days before the one-year anniversary of Russia’s invasion of the country. (Ukrainian Presidential Press Office via AP)

U.S. President Joe Biden shakes hands with Head of Ukraine’s Presidential Office Yermak during a meeting, amid Russia’s attack on Ukraine, in Kyiv, Ukraine February 20, 2023. Ukrainian Presidential Press Service/Handout via REUTERS ATTENTION EDITORS – THIS IMAGE HAS BEEN SUPPLIED BY A THIRD PARTY.