The Justice Department has issued a new legal opinion saying President Donald Trump may invoke executive privilege over certain communications with outside advisers who do not work for the federal government, potentially shielding those advisers from congressional investigations and other legal proceedings. The 21-page opinion from the Office of Legal Counsel says the privilege can apply when confidential communications with private advisers concern "official presidential decisionmaking" and involve the president or his immediate advisers. The opinion is not binding but represents the Justice Department's interpretation of the scope of presidential confidentiality. One person who could benefit from the Justice Department's interpretation is Boris Epshteyn, Trump's personal attorney and outside adviser. The outlet described him as one of the president's most influential outside advisers, particularly on legal matters.