This video is essential viewing. Really, if you care about holding members of the Bush Administration to account for their various improprieties you owe it to yourself to watch this.
Here's a description from the c-span site:
The House Judiciary Committee held a hearing titled "Executive Power and Its Constitutional Limitations" to examine legal and legislative responses to allegations of misconduct and the expansion of executive branch power by the Bush administration. Topics include allegations of: (1) improper politicization of the Justice Department and the U.S. Attorneys offices, including potential misuse of authority with regard to election and voting controversies; (2) misuse of executive branch authority and the adoption and implementation of the so-called unitary executive theory, including in the areas of presidential signing statements and regulatory authority; (3) misuse of investigatory and detention authority with regard to U.S. citizens and foreign nationals, including questions regarding the legality of the administration's surveillance, detention, interrogation, and rendition programs; (4) manipulation of intelligence and misuse of war powers, including possible misrepresentations to Congress related thereto; (5) improper retaliation against administration critics, including disclosing information concerning CIA operative Valerie Plame, and obstruction of justice related thereto; and (6) misuse of authority in denying Congress and the American people the ability to oversee and scrutinize conduct within the administration, including through the use of various asserted privileges and immunities.