The immunity of the President’s immediate advisers from compelled congressional testimony on matters related to their official responsibilities has long been recognized and arises from the fundamental workings of the separation of powers. This immunity applies to former senior advisers such as the former White House Counsel. Accordingly, the former Counsel is not legally required to appear and testify about matters related to his official duties as Counsel to the President.
The President does not waive an adviser’s immunity from compelled congressional testimony by authorizing disclosure of any particular information. The disclosure’s impact on executive privilege does not ultimately bear on any underlying immunity from compelled testimony.
Because Congress may not constitutionally compel the former Counsel to testify about his official duties, he may not be civilly or criminally penalized for following a presidential directive not to appear. The same rationale applies equally to an exercise of inherent contempt powers against a senior aide who has complied with a presidential direction that he not provide testimony to a congressional committee.