Fox News White House correspondents share shock over Karine Jean-Pierre's party switch

Former Biden White House press secretary Karine Jean-Pierre stunned political circles by announcing she is leaving the Democratic Party and re-branding herself as an independent. 

The move, unveiled alongside the upcoming launch of her new book, also shocked the Fox News White House correspondents who covered her closely and set off a firestorm with their Biden-era sources.

"I found her, behind the scenes, to be a very nice person," senior White House correspondent Peter Doocy recalled on "America's Newsroom" Thursday.