The AP and other news organizations, citing anonymous sources, reported that the federal prosecutors’ office in Chicago had opened an investigation. WASHINGTON — The top federal prosecutor in Chicago denied Thursday evening that his office had opened an investigation into E. Jean Carrollthe longtime advice columnist who has said Donald Trump sexually assaulted her in a New York department store 30 years ago. The denial came hours after multiple news organizations reported that the Justice Department was investigating whether she had lied during the course of civil litigation against Trump. The Associated Press and other news organizations, citing anonymous sources,…