Biden announced in May that he had prostate cancer that had spread to his bones. It was “characterized by a Gleason score of 9 (Grade Group 5) with metastasis to the bone,” per his office. The stages of cancer, as said by Trump, though, are not the same as their Gleason score or Grade Group.

Harris describes Biden's debate struggles in her new memoir, noting he missed opportunities to attack Trump and appeared disoriented during key moments.