The Original Sin co-author discusses the former president’s decline and why it still matters amid Trump’s chaos.

When does the promotional tour for a book turn into a potential public-relations headache? That's the question raised by the blowback to "Original Sin," the behind-the-scenes look at Joe Biden's age-related infirmities,

Right-wing pundit Megyn Kelly on Tuesday grilled CNN anchor Jake Tapper over what she claimed was his role in covering up former President Joe Biden’s mental decline while in office. His new book, Original Sin,