Internal Revenue Service

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Internal Revenue Service Commissioner John Koskinen says he is eager to put behind him a scandal about the agency's targeting of certain tax exempt organizations. (Associated Press)

In this May 22, 2013, photo, Lois Lerner listens on Capitol Hill in Washington. A day after she refused to answer questions at a congressional hearing, Lerner has been replaced as director the Internal Revenue Service division that oversaw agents who targeted tea party groups. Danny Werfel, the agency's new acting commissioner, told IRS employees in an email Thursday, May 23, 2013, that he has selected a new acting head of the division, staying within the IRS to find new leadership. (AP Photo/J. Scott Applewhite)

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Internal Revenue Service (IRS) Commissioner John Koskinen arrives on Capitol Hill in Washington, Wednesday, Feb. 5, 2014, to testify before the House Ways and Means Oversight subcommittee hearing focusing on a variety of issues facing the IRS, including the ongoing investigation into the IRS targeting of certain tax exempt organizations and IRS responsibilities under the Affordable Care Act. (AP Photo/J. Scott Applewhite)

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HOLDING: "All the options that we have are on the table," says Attorney General Eric H. Holder Jr., who insists his department's inquiry into the IRS is free from politics. (Associated Press)

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In a letter asking Barbara Bosserman, the lawyer involved in the IRS investigation, to testify at a hearing next week, Rep. Jim Jordan, Ohio Republican, expressed concern over Ms. Bosserman's history of financial and personal support for President Obama. (Associated Press)

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Labor Secretary Thomas E. Perez is facing questions from Republicans over what he knows about the woman heading an investigation into the IRS' targeting of tea party groups. (ASSOCIATED PRESS)