The White House Counsel advises the President on all legal issues concerning the Office of the President and the White House.
Consequently, the plaintiff had the right to depose the attorney despite his in-house status. Thus, knowing that the privilege applies to in-house counsel, the inquiry shifts to the scope of the privilege.
Therefore, controversy has emerged over the scope of the attorney–client privilege between the counsel and the president and vice president, namely with John Dean of Watergate notoriety. It is clear, however, that the privilege does not apply in strictly personal matters.
Although historically courts held there was no privilege, more recently courts—including one California court—have concluded that communications between attorneys and their firm's in-house counsel are privileged.
Limitations. Although the White House counsel offers legal advice to the president and vice president, the counsel does so in the president's and vice president's official capacity, and does not serve as the president's personal attorney.
If the purpose is legal advice, the communication is privileged if it's confidential and between lawyer and client. On the other hand, if the lawyer is acting as a business negotiator or advisor, the communication probably is not privileged. An in-house lawyer fulfills multiple roles!
Congressional investigations are distinct from other government investigations in meaningful ways. A key distinguishing factor is the treatment of the attorney-client privilege, a common law privilege that Congress generally does not recognize.
To be safe put "Attorney-Client Communication", "Privileged and Confidential" or "Attorney Work Product" in the subject of the e-mail, or on privileged documents.
Common interest privilege, also known as the joint defense privilege, is an extension of attorney-client privilege that protects the compelled disclosure of communications between two or more parties and/or their respective counsel when the parties are allied in a common legal interest.