Ana Navarro prodded fellow CNN contributor Scott Jennings during a tense exchange about White House Press Secretary Katie Zacharia’s rocky debut in her new role. Jennings and Navarro joined the panel on Abby Phillip’s NewsNight on Wednesday, where Jennings offered a more positive review of Zacharia’s first day than most others. Navarro hit back at Jennings by joking that he may get another shot at the press secretary job, a role he was previousl…