evidence: WASHINGTON — President Joe Biden is expected to discuss the future of his re-election campaign with family at Camp David, Maryland, on Sunday, following a nationally televised debate Thursday that left many fellow Democrats worried about his ability to beat former President Donald Trump in November, according to five people familiar with the matter. [...] Anita Dunn, one of Biden’s handful of closest advisers, said Saturday on MSNBC’s "The Weekend" that Biden has not discussed dropping out of the race with aides and that internal talks have focused on moving forward. [...] Party elites will urge him to exit the race only if they determine that he is "not viable and negatively impacting the House and Senate races," said one big-time donor who is close to both Obama and Biden.