Karoline Leavitt has obliterated Joe Biden's former press secretary in a scathing on-air takedown, calling her 'bitter' as she embarks on a nationwide media blitz to sell her memoir. Leavitt was speaking with Jesse Watters on Fox when she was asked to respond to Karine Jean-Pierre's recent rebuke calling her 'deplorable.' Without missing a beat, Leavitt launched into a 90-second blitz on Jean-Pierre's character and role in the White House during her time under Biden. 'With all due respect to my predecessor, she is one of the main culprits of the greatest cover-up and scandals in American history,' she said....