Congressional Research Service
Impeachment Investigations: Law and Process
LSB10347 
Download LSB10347 PDFVersions Todd Garvey, Jared P. Cole Oct 02, 2019
The Impeachment and Trial of a Former President
LSB10565 Download LSB10565 PDFVersions Jared P. Cole,Todd Garvey Jan 15, 2021
Obtaining Witnesses In an Impeachment Trial: Compulsion, Executive Privilege, and the Courts
LSB10396 Download LSB10396 PDF Todd Garvey Jan 21, 2020
Impeachment and the Constitution
R46013 Download R46013 PDFVersions Jared P. Cole,Todd Garvey Nov 20, 2019
UPDATE: Grand Jury Secrecy and Impeachment: Implications of D.C. Circuit Ruling on the Special Counsel’s Report
LSB10426 Download LSB10426 PDFVersion Michael A. Foster Oct 22, 2020
Congressional Access to Information in an Impeachment Investigation
R45983 Download R45983 PDFVersions Todd Garvey Oct 25, 2019
The Impeachment Process in the House of Representatives
R45769 Download R45769 PDFVersions Elizabeth Rybicki, Michael Greene Nov 14, 2019
The Impeachment Process in the Senate
R46185 Download R46185 PDFVersions Elizabeth Rybicki, Michael Greene Jan 27, 2021
Congressional Subpoenas of Presidential Advisers: The Impact of Committee on the Judiciary v. McGahn
LSB10373 Download LSB10373 PDFVersions Todd Garvey Dec 03, 2019