Jack Anderson, the crusading journalist who tackled powerful figures like J. Edgar Hoover and won a Pulitzer prize for his reporting on the Nixon administration, died on Saturday at age 83. Complications from a 19-year battle with Parkinson's disease were the cause of death, his son Randy Anderson said in a brief telephone interview. .... Anderson also made it onto the former Nixon administration's "enemies list." G. Gordon Liddy, the Watergate conspirator, once said that he and other White House operatives discussed at the time how to stop Anderson including through slipping him drugs though no action was taken.