Age concerns persist as Biden addresses re-election plans.

President Joe Biden addressed concerns about his age, saying Americans will be able to judge whether he has what it takes to serve a second term in the White House. Biden, who announced his reelection bid Tuesday, is already the oldest-serving president. Most Democrats, according to multiple polls, say they prefer a different presidential nominee, with Biden's age topping their concerns. Biden also downplayed his approval ratings, which are in the low 40s, saying there's "nothing new about that" compared to past incumbent presidents at this juncture of their terms.