The Justice Department intervenes to help the president in a defamation lawsuit brought by a woman who accused Trump of sexually assaulting her in the 90's. Also, the need for a coronavirus vaccine has become a key issue in the presidential race. President Trump is on the campaign trail toting the arrival of a vaccine before the end of the year. And, the police chief and entire command staff of the police department in Rochester, New York, resigned on Tuesday amid outrage over the death of Daniel Prude in police custody.