Presidential Advisers' Testimony before Congressional Committees: An Overview [Updated April 10, 2007] [open pdf - 185KB]
"Since the beginning of the federal government, Presidents have called upon executive branch officials to provide them with advice regarding matters of policy and administration. While Cabinet members were among the first to play such a role, the creation of the Executive Office of the President (EOP) in 1939 and the various agencies located within that structure resulted in a large increase in the number and variety of presidential advisers. All senior staff members of the White House Office and the leaders of the various EOP agencies and instrumentalities could be said to serve as advisers to the President. Occasionally, these executive branch officials playing a presidential advisory role have been called upon to testify before congressional committees and subcommittees. Sometimes, such invited appearances have been prompted by allegations of personal misconduct on the part of the official, but they have also included instances when accountability for policymaking and administrative or managerial actions have instigated the request for testimony. Because such appearances before congressional committees or subcommittees seemingly could result in demands for advice proffered to the President, or the disclosure - inadvertent or otherwise - of such advice, there has been resistance, from time to time, by the Chief Executive to allowing such testimony."
CRS Report for Congress, RL31351