Conservatives have criticized the new Internal Revenue Service rules for political dark money as an Obama administration attempt to gain political advantage. Susan Walsh/AP hide caption

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It would be a vast understatement to say that Republican Rep. Darrell Issa (right) of California and Democratic Rep. Elijah Cummings of Maryland don't see eye to eye on the IRS scandal's latest development. J. Scott Applewhite/AP hide caption

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Lois Lerner, head of the IRS unit that decides whether to grant tax-exempt status to groups, leaves after being dismissed from a House Oversight and Government Reform Committee hearing on Wednesday. J. Scott Applewhite/AP hide caption

itoggle caption J. Scott Applewhite/AP

Internal Revenue Service Director of Exempt Organizations Lois Lerner as she was sworn in at a hearing held Wednesday by the House Committee On Oversight & Government Reform. Chip Somodevilla/Getty Images hide caption

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Outgoing acting Internal Revenue Service Commissioner Steven Miller. Nicholas Kamm /AFP/Getty Images hide caption

itoggle caption Nicholas Kamm /AFP/Getty Images

Ousted IRS chief Steve Miller (right) and J. Russell George, a Treasury inspector general, take the oath before testifying on before the House Ways and Means Committee on Friday. Charles Dharapak/AP hide caption

itoggle caption Charles Dharapak/AP

Former House Speaker Newt Gingrich in April 2012. Christian Gooden/St. Louis Post-Dispatch /MCT /Landov hide caption

itoggle caption Christian Gooden/St. Louis Post-Dispatch /MCT /Landov

Outgoing acting Internal Revenue Service (IRS) Commissioner Steve Miller as he was being sworn in Friday before a House Ways and Means committee hearing. Nicholas Kamm /AFP/Getty Images hide caption

itoggle caption Nicholas Kamm /AFP/Getty Images