Memorandum on Agency Cooperation with Attorney General's Review of Intelligence Activities Relating to the 2016 Presidential Campaigns [open html - 53KB]
From Section 1: "The Attorney General is currently conducting a review of intelligence activities relating to the campaigns in the 2016 Presidential election and certain related matters. The heads of elements of the intelligence community, as defined in 50 U.S.C. 3003(4), and the heads of each department or agency that includes an element of the intelligence community shall promptly provide such assistance and information as the Attorney General may request in connection with that review."
United States. White House Office: https://www.whitehouse.gov/