But even though some of these videos can be easily refuted, the doubts of voters in Biden's age group continue to be one of his biggest vulnerabilities.
This applies to young voters, organizers say, a demographic that has traditionally been more important to Democrats than Republicans in national elections.
Amanda Litman, a Democratic strategist and founder of Run For Something, an organization that trains and supports the next generation of Democratic candidates, said watching the debates can be an “eye-opening experience” for young voters.
Ms. Litman said of the candidates' ages, “I think it shows the political structure in which the older generation has enjoyed the privilege of being in power for a long time.” “This is one of the many reasons why there is apathy, especially among younger voters. They don’t see themselves reflected in leadership.”
Brandt Williams, a 23-year-old accountant from Connecticut, said he would support Biden again in 2024. He views candidate Biden as a politician who handles foreign policy strongly and supports the president's economic policies.
“One problem is pretty common,” Williams said. “His age.”
Williams said she planned to attend Thursday's debate but wished she could have voted for “someone younger, who represents both young and old, as well as vitality.”
In Georgia, a key battleground where the first debate will be held, Democrats told the BBC they sense apathy among young voters. This is why it is a stumbling block for older voters.
“Biden is stuck in a position where the younger generation wants action. They don’t want a speech about how we can be better as a country,” said Titus Nichols, a 39-year-old lawyer based in Cobb County. democrats.
The president is “a more mature and consistent person, but that’s not what people are looking for,” he added.
On Thursday evening, millions of people will tune in not only to hear the candidates' thoughts and arguments, but also to judge their stamina for themselves.
Ms. Litman, the Democratic strategist, said it was very important for Mr. Biden to land a punch if he was to allay fears about his age.
“I think he needs to demonstrate competency and confidence,” she said. “And a little fight.”
