Internal Revenue Service Commissioner John Koskinen is sworn in on Capitol Hill in Washington, Wednesday, March 26, 2014, prior to testifying before the House Oversight Committee hearing probing whether tea party groups were improperly targeted for increased scrutiny by the government’s tax agency. Earlier this month, IRS official Lois Lerner was called to testify about the controversy but refused to answer questions by committee Chairman Darrell Issa, R-Calif., and invoked her Fifth Amendment rights at least nine times. (AP Photo/J. Scott Applewhite)
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