Tiger King star Joe Exotic has announced he's been diagnosed with prostate cancer and has begged for a pardon from the President of the United States, Joe Biden.The 58 year old, who is currently serving a 22-year prison sentence, took to his Twitter feed to share the news with his 57,900 followers as he explained he's set to undergo further tests to determine what stage the cancer is in.The Netflix star, whose real name is Joseph Allen Maldonado-Passage, wrote: "John Phillips has received my