Tammy Faye Bakker, the disgraced televangelist who is suffering from cancer, has penned a goodbye letter to her fans in which she says doctors have halted her treatment. "The doctors have stopped trying to treat the cancer and so now it's up to God and my faith. And that's enough! But please continue to pray for the pain and sick stomach," Tammy Faye, 65, wrote in a letter on her Web site. "My precious daughter, Tammy Sue, and her wonderful friends are staying with me," Tammy Faye wrote. "They don't want me falling down the stairs. I am down weight...