IRS Commissioner John Koskinen will tell the House Judiciary Committee Wednesday that impeaching him would be "improper."

ADVERTISEMENT

"It would create disincentives for many good people to serve," he said, according to prepared testimony. "And it would slow the pace of reform and progress at the IRS."

Koskinen will be the sole witness at Wednesday's hearing, which is the result of an agreement between Judiciary Committee Chairman Bob Goodlatte Robert (Bob) William GoodlatteNo documents? Hoping for legalization? Be wary of Joe Biden Press: Trump's final presidential pardon: himself USCIS chief Cuccinelli blames Paul Ryan for immigration inaction MORE (R-Va.) and House Freedom Caucus Chairman Jim Jordan (R-Ohio) to postpone a vote on an impeachment resolution that was expected last week.

Freedom Caucus members and some other conservatives have argued that Koskinen engaged in misconduct during congressional investigations into the IRS' handling of conservative groups' applications for tax-exempt status. They allege that Koskinen did not comply with a subpoena for former IRS official Lois Lerner's communications, since backup tapes with some of Lerner's emails were destroyed. They also allege that Koskinen lied under oath about the tapes and emails.

Koskinen, who took office several months after the political-targeting scandal broke, said that he "directed IRS staff to cooperate fully with Congress and to recover lost information where possible, and I testified to the best of my knowledge."

But he also acknowledged that some of his testimony later proved to be wrong and some information that Congress requested was not preserved.