Article continues below advertisementPrince Harry and Tina Brown have become embroiled in a heated public dispute after the renowned royal commentator doubled down on a controversial claim involving the Duke of Sussex and his son, Prince Archie.The feud exploded after Brown, 72, accused Harry, 41, of calling Archie, 6, "my little Africa child" during a conversation with late primatologist Jane Goodall about his and wife Meghan Markle's eldest child.