Former President Joe Biden was diagnosed with an aggressive form of prostate cancer, his office announced on Sunday. The Democrat, who was experiencing urinary symptoms, was diagnosed on Friday following the discovery of a nodule on his prostate.

Joe Biden’s metastatic prostate cancer diagnosis, coupled with revelations about his decline in recent years, has renewed chatter and anxiety about the former president’s health.

The book, "Original Sin: President Biden’s Decline, Its Cover-up, and His Disastrous Choice to Run Again," said that Biden stumbled through filming campaign videos so much that the footage was ultima...