WASHINGTON, DC - SEPTEMBER 21: Internal Revenue Service Commissioner John Koskinen (L) greets House Judiciary Committee member Rep. Jason Chaffetz (R-UT) before a hearing of the 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)