House Oversight and Government Reform Committee Chairman Jason Chaffetz, R-Utah, and 18 other Republicans on the committee introduced a resolution on Tuesday to start impeachment proceedings against IRS Commissioner John Koskinen.

Chaffetz said the impeachment effort is a response to Koskinen's failure to comply with a subpoena demanding records relating to Lois Lerner's role in the IRS targeting scandal. Republicans say the IRS erased 422 backup tapes that included thousands of Lerner's missing emails.

He also said Koskinen offered false testimony to Congress, when he said Lerner's emails were unrecoverable, and failed to tell Congress that some evidence was missing.

"Commissioner Koskinen violated the public trust," Chaffetz said. "He failed to comply with a congressionally issued subpoena, documents were destroyed on his watch, and the public was consistently misled."

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