New details about former US president Joe Biden’s health emerged this week after his son, Hunter Biden, said in a BBC interview that the cancer his father disclosed earlier this year has continued to spread. But in a wide-ranging interview published with BBC Newsnight, Hunter Biden said the disease has progressed despite those efforts. At several points, Hunter Biden became emotional as he spoke about watching his father’s condition worsen. “It’s really, really hard, and it’s really sad to watch,” he added. Joe Biden’s health had long drawn scrutiny during his presidency, in part because he was the oldest-ever US president.