REHOBOTH BEACH, Del. (AP) — President Joe Biden is joking that it’s difficult acknowledging he’s about to turn 80. But he says he’s physically and mentally capable of serving a potential second term in the White House. Biden turns 80 on Nov. 20. He says it’s “totally legitimate” for voters to question whether someone his age can manage the demanding stresses of the American presidency. Biden made the comment in response to a question about his age during an MSNBC interview. Biden says voters should judge for themselves whether he’s up to the task. Biden would be 82 on Inauguration Day in January 2025. Donald Trump, who’s considering running again, would be 78,.