Former Biden press secretary Karine Jean-Pierre leaves Democratic Party

Former White House press secretary Karine Jean-Pierre has become an independent after serving under two Democratic presidents, according to the publisher of a new book from Jean-Pierre out this fall.

The big picture: Jean-Pierre, whose encounters with White House reporters grew tense last year amid questions concerning former President Biden's age and health, will detail in her new book the weeks that led to his 2024 campaign departure, per a publisher's description.

Driving the news: The book, "Independent: A Look Inside a Broken White House, Outside the Party Lines," pledges to take readers through the "betrayal by the Democratic Party" that prompted Biden's decision.