James, Pippa and Carole Middleton are a “bedrock” of support for Princess Kate amid her cancer treatment, a royal commentator exclusively told GB News. The Princess of Wales announced in March that she had begun a course of preventative chemotherapy following planned abomdinal surgery in January. James Middleton, 37, was Kate’s first family member to publicly wish the Princess of Wales well on social media. He wrote: “Over the years, we have climbed many mountains together. “As a family, we will climb this one with you too.” This caption was accompanied by an old photograph of Kate and her you…