Joe Biden’s press secretary has been slammed for calling Kate the “Duchess of Cambridge”, after hearing the news she had been diagnosed with cancer. On Friday evening, the Princess of Wales released a video via Kensington Palace, where she announced she is undergoing preventative chemotherapy for cancer. In January, Kate, 42, was hospitalised for 13 days after having planned abdominal surgery. At the time, Kensington Palace reported that the princess’s condition was noncancerous. However, tests following the operation showed cancer was present, which Kate revealed in her statement on Friday ev…