Sarah Ferguson urged the King to “keep fighting” during a moving speech, as Prince Harry shunned his father in Las Vegas. The Duchess of York took to the stage in Palm Beach, Florida on Wednesday to give a speech at The Breakers Hotel. Fergie, as she is affectionately known, was attending the Cancer Alliance of Help and Hope’s Palm Beach charity event. During her impassioned speech, Sarah shared a touching tribute to King Charles as she thanked the charity for supporting her family. Both members of the Royal Family were recently diagnosed with cancer, with the duchess’s being skin cancer. Sara…