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   ACongressional                                                         _______
           ~Research Service
                informing the Iegislative debate since 1914





Legislative Purpose and Adviser Immunity in

Congressional Investigations



May 24, 2019
The Trump Administration has recently questioned the legal validity of numerous investigative demands
made by House committees. These objections have been based on various grounds, but two specific
arguments will be addressed in this Sidebar. First, the President and other Administration officials have
contended that certain committee demands lack a valid legislative purpose and therefore do not fall
within Congress's investigative authority. This objection has been made not only in response to
investigations seeking information relating to the President's personal finances, including his financial
records and federal tax returns, but also to challenge a subpoena issued by the House Judiciary Committee
for the complete version of Special Counsel Mueller's report along with underlying evidence and
materials. Second, the President has made a more generalized claim that his advisers cannot be made to
testify before Congress, even in the face of a committee subpoena. This position, based upon the
executive branch's longstanding conception of immunity for presidential advisers from compelled
congressional testimony regarding their official duties, was recently put into effect by the White House in
a letter announcing that the President directed former White House counsel Don McGahn not to appear at
a scheduled House Judiciary Committee hearing. The letter asserted that Mr. McGahn, now a private
citizen, is absolutely immune from compelled congressional testimony with respect to matters occurring
during his service as a senior adviser to the President.
While the particulars of any given information access dispute between the executive and legislative
branches are important, existing legal precedent would suggest that these types of objections to
Congress's exercise of its constitutionally based investigatory powers will likely face an uphill battle. As
to the first question, courts have only rarely invalidated congressional investigative demands on the
ground that the committee lacks a legislative purpose. Instead, courts have generally acknowledged that
the judiciary has a duty of not lightly interfering with Congress' exercise of its legitimate powers. When
the courts have questioned whether a committee is acting with a valid purpose, the issue has generally
arisen in connection to an investigative demand issued to a private citizen that implicates individual
constitutional rights, rather than in connection to an investigation of a government official. Recently, two
federal district courts (in cases initiated by President Trump and affiliated entities) rejected arguments
made by President Trump's personal attorneys that House committees exceeded their investigative
authority by demanding access to the President's personal and organizational financial statements. In
Trump v. Committee on Oversight and Reform, the U.S. District Court for the District of Columbia held

                                                                 Congressional Research Service
                                                                   https://crsreports.congress.gov
                                                                                      LSB10301

CRS Legal Sidebar
Prepared for Members and
Committees of Congress

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