"The cancer has spread, ‌metastasised into his bones and further," Hunter Biden told BBC's Newsnight, according to video posted online on Friday. A spokesman ‌for the ‌83-year-old Democrat ⁠declined on Saturday to comment on Hunter ​Biden's interview. A Biden spokesman ​said in ‌October he was undergoing radiation treatment and hormone therapy. Biden was the oldest person to win the US presidency at the time of his election ​in ​2020. Biden attended the dedication of Barack Obama's presidential library in June in Chicago.