A New York Times newsletter article reports that Joseph R. Biden Jr., 83, says his cancer — an aggressive prostate cancer diagnosed in 2025 that spread to his bones — will keep him from making as many public appearances to promote his memoir "Promise Me, America" as he had hoped, writing on X, "It hasn't stopped me. But sometimes it slows me down." The $10 million memoir, due Nov. 17, 2026, covers his presidency; Hunter Biden has said his father's condition was worsening, though medical experts uninvolved in his care say the cancer was unlikely to have affected his June 2024 debate performance.