The issues about investigating Presidential abuse of power, authorizing torture, violating the Foreign Surveillance Intelligence Act, etc., are gaining ground.
Rep. John Conyers has submitted a bill to establish a National Commission on Presidential War Powers and Civil Liberties. Its purpose is to establish a Blue Ribbon Commission comprised of experts outside government service to investigate the broad range of policies of the Bush administration that were undertaken under claims of unreviewable war powers.
On Barack Obama's Change.gov (click on Additional Issues), the question about appointing a special prosecutor to investigate alleged authorization of torture and illegal surveillance has received the most votes of any question on the site.
Let your senators and representative know how you feel about this.
If we do nothing, then future presidents have established precedents on which to base decisions in which they can violate the law. It's like not doing anything the first time your child back-sasses you--but on a far, far greater scale.