http://www.fas.org/sgp/crs/natsec/RL33215.pdf
Reviews the history of legislative efforts to protect federal employees who testify about agency abuses from retaliation. From the Congressional Research Service, posted by the Federation of American Scientists.
http://www.fas.org/sgp/crs/intel/m010506.pdf
Full title is Presidential Authority to Conduct Warrantless Electronic Surveillance to Gather Foreign Intelligence Information. Study by the Congressional Research Service that analyzes the constitutional and statutory issues raised by the surveillance activities undertaken by presidential executive order and concludes that the Administration’s legal justification does not seem to be as well-grounded as the tenor of the December 22nd letter of explanation suggests. Posted by the Federation of American Scientists.