Former President Biden's disclosure that he had Stage 4 prostate cancer was quickly met with sympathy late Sunday. By Monday morning, the questions — from Democrats and Republicans alike — had begun.

After a stretch of limited public appearances since leaving office, former President Joe Biden’s cancer diagnosis arrived amid heightened scrutiny of his cognitive health.

Did Jill Biden cover up her husband’s illness? A DOJ official suggests “elder abuse” charges could be on the table after Biden’s cancer revelation sparks outrage and claims of a political cover-up.

Biden's health, both physical and mental, was discussed at length during the 2024 presidential election cycle, more recently after excerpts from a new book by CNN 's Jake Tapper and Axios' Alex Thompson, Original Sin: President Biden's Decline, Its Cover-Up, and His Disastrous Choice to Run Again, were published by multiple media outlets.

The news around former President Biden’s prostate cancer diagnosis is putting a spotlight on his physician, Kevin O’Connor, and whether he had taken adequate measures to monitor Biden’s health.

In a copy of "Original Sin, President Biden's Decline, Its Cover-Up, and His Disastrous Choice to Run Again" obtained by ABC News, authors and journalists Jake Tapper and Alex Thompson allege that former President Joe Biden hid information about the cancer diagnosis of his late son,

The news of Joe Biden's prostate cancer diagnosis has raised questions about why the disease wasn't detected earlier.

Former U.S. President Joe Biden’s cancer diagnosis brings forth inquiries about his health transparency during his presidency. Miscommunication about his condition further fuels debates. Both Trump's critique and a new book spotlight concerns on Biden's mental acuity and health transparency during his tenure,