Kyle Sampson, former top aide to Attorney General Alberto Gonzales, told the Senate Judiciary Committee today prosecutors were not fired to gain "partisan advantage." He also said that Gonzales did not give "accurate" testimony when he told Congress he was not directly involved in ousting the US attorneys. We hear more about Sampson's testimony and another top Gonzales aide who invoked the 5th Amendment. What's at stake for the Attorney General himself, and what's the history of political involvement with the Department of Justice? We hear from journalist, political scientists, and legal experts, including two former Justice Department officials.