A 2008 report by the Congressional Research Service discussed the history of claims of executive privilege, including various unresolved questions surrounding its use. The Obama Administration asserted executive privilege today in connection with records sought by a House Committee. See Presidential Claims of Executive Privilege: History, Law, Practice and Recent Developments, updated August 21, 2008.
Newly updated reports from the Congressional Research Service that Congress has not made publicly available include the following.
U.S.-China Military Contacts: Issues for Congress, June 19, 2012
Madagascar’s Political Crisis, June 18, 2012
U.S. Trade Deficit and the Impact of Changing Oil Prices, June 18, 2012
Federal Taxation of Aliens Working in the United States, May 18, 2012