From the story here:
Ronald Machen, the U.S. attorney for the District of Columbia appointed by President Obama and set to step down next month, has not acted on a contempt of Congress charge for former IRS official Lois Lerner.
Machen, who announced at the beginning of the week he'd step down April 1 to return to private practice, has not referred Lerner's case to a grand jury. Her contempt citation for not testifying at two hearings has been in Machen's hands since May 2014. ...
The Obama administration has also not publicly released hundreds of documents related to the IRS's targeting of Tea Party groups.