David Letterman will headline a fundraiser for President Joe Biden on July 29 in Martha’s Vineyard, alongside Hawaii Governor Josh Green. This event underscores Biden's determination to continue his re-election campaign despite calls from some Democrats and celebrities, including George Clooney and Cherry Jones, for him to step aside due to concerns about his age and debate performance. Biden, recovering from COVID-19, insists he is the best candidate to defeat Donald Trump and is preparing to return to the campaign trail. The fundraiser is one of several planned events aimed at bolstering support amid donor anxiety about the future of the Democratic Party.