WASHINGTON, DC - SEPTEMBER 21: House Judiciary Committee member Rep. Jason Chaffetz (R-UT) questions Internal Revenue Service Commissioner John Koskinen during a hearing in the Rayburn House Office Building on Capitol Hill September 21, 2016 in Washington, DC. Despite the lack of evidence against him, Koskinen is facing impeachment threats from conservatives in the House of Representatives for his role in the destruction of computer backups containing thousands of emails sought by Congress in its investigation of political targeting. (Photo by Chip Somodevilla/Getty Images)

WASHINGTON, DC - SEPTEMBER 21: House Judiciary Committee member Rep. Cedric Richmond (R-LA) (L) questions Internal Revenue Service Commissioner John Koskinen during a hearing in the Rayburn House Office Building on Capitol Hill September 21, 2016 in Washington, DC. Despite the lack of evidence against him, Koskinen is facing impeachment threats from conservatives in the House of Representatives for his role in the destruction of computer backups containing thousands of emails sought by Congress in its investigation of political targeting. (Photo by Chip Somodevilla/Getty Images)

WASHINGTON, DC - SEPTEMBER 21: House Judiciary Committee member Rep. Jason Chaffetz (R-UT) questions Internal Revenue Service Commissioner John Koskinen during a hearing in the Rayburn House Office Building on Capitol Hill September 21, 2016 in Washington, DC. Despite the lack of evidence against him, Koskinen is facing impeachment threats from conservatives in the House of Representatives for his role in the destruction of computer backups containing thousands of emails sought by Congress in its investigation of political targeting. (Photo by Chip Somodevilla/Getty Images)

A computer screen showing stock graphs is reflected on glasses in this illustration photo taken in Bordeaux, France, March 30, 2016. REUTERS/Regis Duvignau

WASHINGTON, DC - SEPTEMBER 21: Internal Revenue Service Commissioner John Koskinen testifies before the House Judiciary Committee in the Rayburn House Office Building on Capitol Hill September 21, 2016 in Washington, DC. Despite the lack of evidence against him, Koskinen is facing impeachment threats from conservatives in the House of Representatives for his role in the destruction of computer backups containing thousands of emails sought by Congress in its investigation of political targeting. (Photo by Chip Somodevilla/Getty Images)

WASHINGTON, DC - SEPTEMBER 21: Internal Revenue Service Commissioner John Koskinen testifies before the House Judiciary Committee in the Rayburn House Office Building on Capitol Hill September 21, 2016 in Washington, DC. Despite the lack of evidence against him, Koskinen is facing impeachment threats from conservatives in the House of Representatives for his role in the destruction of computer backups containing thousands of emails sought by Congress in its investigation of political targeting. (Photo by Chip Somodevilla/Getty Images)

WASHINGTON, DC - SEPTEMBER 21: Internal Revenue Service Commissioner John Koskinen testifies before the House Judiciary Committee in the Rayburn House Office Building on Capitol Hill September 21, 2016 in Washington, DC. Despite the lack of evidence against him, Koskinen is facing impeachment threats from conservatives in the House of Representatives for his role in the destruction of computer backups containing thousands of emails sought by Congress in its investigation of political targeting. (Photo by Chip Somodevilla/Getty Images)

WASHINGTON, DC - SEPTEMBER 21: Internal Revenue Service Commissioner John Koskinen testifies before the House Judiciary Committee in the Rayburn House Office Building on Capitol Hill September 21, 2016 in Washington, DC. Despite the lack of evidence against him, Koskinen is facing impeachment threats from conservatives in the House of Representatives for his role in the destruction of computer backups containing thousands of emails sought by Congress in its investigation of political targeting. (Photo by Chip Somodevilla/Getty Images)