The Bush administration invoked executive privilege on six occasions.
President George W. Bush first asserted executive privilege to deny disclosure of sought details regarding former Attorney General Janet Reno, the scandal involving Federal Bureau of Investigation (FBI) misuse of organized-crime informants James J. Bulger and Stephen Flemmi in Boston, and Justice Department deliberations about President Bill Clinton's fundraising tactics, in December 2001.
Bush invoked executive privilege "in substance" in refusing to disclose the details of Vice President Dick Cheney's meetings with energy executives, which was not appealed by the GAO. In a separate Supreme Court decision in 2004, however, Justice Anthony Kennedy noted "Executive privilege is an extraordinary assertion of power 'not to be lightly invoked.' United States v. Reynolds, 345 U.S. 1, 7 (1953).
Further, on June 28, 2007, Bush invoked executive privilege in response to congressional subpoenas
requesting documents from former presidential counsel Harriet Miers and former political director Sara Taylor, citing that:
The reason for these distinctions rests upon a bedrock presidential prerogative: for the President to perform his constitutional duties, it is imperative that he receive candid and unfettered advice and that free and open discussions and deliberations occur among his advisors and between those advisors and others within and outside the Executive Branch.
On July 9, 2007, Bush again invoked executive privilege to block a congressional subpoena requiring the testimonies of Taylor and Miers. Furthermore, White House Counsel Fred F. Fielding refused to comply with a deadline set by the chairman of the Senate Judiciary Committee to explain its privilege claim, prove that the president personally invoked it, and provide logs of which documents were being withheld. On July 25, 2007, the House Judiciary Committee voted to cite Miers and White House Chief of Staff Joshua Bolten for contempt of Congress.
On July 13, less than a week after claiming executive privilege for Miers and Taylor, Counsel Fielding effectively claimed the privilege once again, this time in relation to documents related to the 2004 death of Army Ranger Pat Tillman. In a letter to the House Committee on Oversight and Government Reform, Fielding claimed certain papers relating to discussion of the friendly-fire shooting “implicate Executive Branch confidentiality interests” and would therefore not be turned over to the committee.
On August 1, 2007, Bush invoked the privilege for the fourth time in little over a month, this time rejecting a subpoena for Karl Rove. The subpoena would have required the President's Senior Advisor to testify before the Senate Judiciary Committee in a probe over fired federal prosecutors. In a letter to Senate Judiciary Chairman Patrick Leahy, Fielding claimed that "Mr. Rove, as an immediate presidential advisor, is immune from compelled congressional testimony about matters that arose during his tenure and that relate to his official duties in that capacity...."
Leahy claimed that President Bush was not involved with the employment terminations of U.S. attorneys. Furthermore, he asserted that the president's executive privilege claims protecting Josh Bolten, and Karl Rove are illegal. The Senator demanded that Bolten, Rove, Sara Taylor, and J. Scott Jennings comply "immediately" with their subpoenas, presumably to await a further review of these matters. This development paved the way for a Senate panel vote on whether to advance the citations to the full Senate. "It is obvious that the reasons given for these firings were contrived as part of a cover up and that the stonewalling by the White House is part and parcel of that same effort", Leahy concluded about these incidents.
As of July 17, 2008, Rove still claimed executive privilege to avoid a congressional subpoena. Rove's lawyer wrote that his client is "constitutionally immune from compelled congressional testimony."