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February 6, 2016

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Internal Revenue Service Commissioner John Koskinen testifies on Capitol Hill in Washington, Friday, June 20, 2014, before the House Ways and Means Committee as it continues to probe whether tea party groups were improperly targeted for increased scrutiny by the IRS.

J. Scott Applewhite / AP

Internal Revenue Service Commissioner John Koskinen testifies on Capitol Hill in Washington, Friday, June 20, 2014, before the House Ways and Means Committee as it continues to probe whether tea party groups were improperly targeted for increased scrutiny by the IRS.