FILE - President Joe Biden, left, speaks at an event with G7 leaders and Ukrainian President Volodymyr Zelensky during the NATO Summit, in Vilnius, Lithuania, July 12, 2023. Biden's strong backing for Ukraine's effort to repel Russia's invasion has been the rare issue where he's mustered bipartisan support. But this week’s first GOP presidential debate—and recent comments by former President Donald Trump on Ukraine— suggest that the dynamic will face a stress test as the 2024 presidential campaign heats up. (Paul Ellis/Pool Photo via AP, File)