Inside Jill Biden's political rise amid her husband's cognitive decline: Book

Former President Joe Biden's inner circle considers first lady Jill Biden one of the most powerful first ladies in history, CNN anchor Jake Tapper and Axios political correspondent Alex Thompson reveal in their new book, "Original Sin."

Jill Biden, a Ph.D. whom White House staffers called "Dr. B" for short, was a reluctant political spouse in the early days of her husband's career. During his presidential campaigns and into his presidency, the first lady became his staunchest defender and...