Realizing his mistake, he quickly corrected himself, saying, "Going to beat President Putin, President Zelenskiy. I am so focused on beating Putin."

This slip of the tongue was just one in a series of verbal slip-ups by the 81-year-old president on Thursday. These gaffes are an unfortunate development as Biden tries to move past concerns that he is too old to run for re-election. Verbal gaffes are not unusual in Biden’s long political career, as he has overcome a childhood stutter. However, there is closer attention on him now, especially after his dismal debate performance against Republican candidate Donald Trump last month.

Trump, who is 78 and also faces concerns about his age, frequently made false claims during the debate and often rambled during campaign speeches.