The revelation of former President Joe Biden ‘s cancer diagnosis has seemed to halt the ongoing debate over his fitness for office. But the co-author of the new book “ Original Sin ” tells Variety that conversation is fair, and should continue.

Journalists Jake Tapper and Alex Thompson join Morning Joe to discuss their new book 'Original Sin: President Biden's Decline, Its Cover-Up, and His Disastrous Choice to Run Again'.

Jake Tapper and Alex Thompson's book has already generated a national debate about whether the White House deceived the public about the president's cognitive state and how Biden's late exit from the race undermined the Democratic Party's chances of stopping Trump.

A code of silence among Democratic elites and the media prohibited any public talk of Joe Biden’s decline—until it was too late.

Tapper's book, co-authored by Alex Thompson, describes a president who struggled to function: "One person told us that the presidency was, at best, a five-person board with Joe Biden as chairman."

The book by CNN anchor Jake Tapper and Axios reporter Alex Thompson asks and answers troubling questions about Biden’s health and the world’s most powerful political office

Jake Tapper and Alex Thompson’s new book is an investigative account of loyalists and family members who shielded the diminished president from full public view.

Mike Donilon's salary was "orders of magnitude higher," creating jealousy among Joe Biden's team, according to "Original Sin."