 But behind the scenes, some in the party raising questions about whether Biden should be replaced at the top of the ticket and who might be able to convince him to step aside. That's ABC's Mary Alice Parks in North Carolina. The president acknowledged his subpar performance, saying he does not debate like he used to. Former President Donald Trump campaigning in Chesapeake, Virginia, said Joe Biden spent the entire week at Camp David resting, working, studying. He studied very hard. He studied so hard that he didn't know what the hell he was doing.