
**FILE** Attorney General Eric Holder, the nation's top law enforcement official, testifies on Capitol Hill in Washington on May 15, 2013, before the House Judiciary Committee oversight hearing on the U.S. Department of Justice. (Associated Press)

**FILE** Attorney General Eric Holder, the nation's top law enforcement official, testifies on Capitol Hill in Washington on May 15, 2013, before the House Judiciary Committee oversight hearing on the U.S. Department of Justice. (Associated Press)

**FILE** Attorney General Eric Holder, the nation's top law enforcement official, testifies on Capitol Hill in Washington on May 15, 2013, before the House Judiciary Committee oversight hearing on the U.S. Department of Justice. (Associated Press)

** FILE ** Attorney General Eric Holder listens as he testifies on Capitol Hill in Washington on March 6, 2013, before the Senate Judiciary Committee hearing "Oversight of the U.S. Department of Justice." (Associated Press)

** FILE ** Attorney General Eric Holder listens as he testifies on Capitol Hill in Washington on March 6, 2013, before the Senate Judiciary Committee hearing "Oversight of the U.S. Department of Justice." (Associated Press)

** FILE ** Attorney General Eric Holder listens as he testifies on Capitol Hill in Washington on March 6, 2013, before the Senate Judiciary Committee hearing "Oversight of the U.S. Department of Justice." (Associated Press)

A page from a U.S. Justice Department memo obtained using the Freedom of Information Act. The entire document was redacted. (Image: U.S. Department of Justice)

Attorney General Eric Holder testifies on Capitol Hill in Washington on March 6, 2013, before the Senate Judiciary Committee hearing "Oversight of the U.S. Department of Justice." (Associated Press)

Attorney General Eric Holder testifies on Capitol Hill in Washington on March 6, 2013, before the Senate Judiciary Committee hearing "Oversight of the U.S. Department of Justice." (Associated Press)