 NPR's Ashley Westerman has more from Kyiv. Ukraine is grateful to President Biden for his, quote, unwavering support. President Zelensky wrote on X a few hours after the U.S. president announced he would not seek re-election. Zelensky went on to say that Ukraine respects Biden's tough but strong decision, and he hopes to be able to continue to count on America's leadership in his country's battle against Russian aggression. He did not mention Vice President Kamala Harris in his social media post.