Former CNN political reporter Nia-Malika Henderson tore into former first lady Jill Biden for her forthcoming memoir , branding the tome “an act of supreme selfishness” and accusing her of helping conceal concerns about her husband’s fitness for office as he sought re-election. In a blistering Bloomberg Opinion column published Friday , Henderson argued that Biden’s new book, “View From the East Wing,” confirms longstanding suspicions that she privately recognized signs of former President Joe