Biden could decide within days whether to remain in the presidential race

President Joe Biden is back on the campaign trail in Pennsylvania, addressing concerns about his age and performance after a recent debate. Despite efforts to reassure his party, some Democrats are calling for him to step aside. Allies urge Biden to demonstrate his capability for another term. Representative Adam Schiff highlights Biden's age as a factor in the race against Donald Trump. Democratic leaders plan meetings to discuss Biden's candidacy, while Republicans request an interview with Biden's doctor to clarify his health status.

What implications does Biden's age have on his campaign against Donald Trump according to the text?

What did House Minority Leader Hakeem Jeffries plan to discuss in his meeting regarding Biden's candidacy?