IRS Commissioner John Koskinen will not appear at a “misconduct” hearing Tuesday where Republicans will lay out a case to impeach him for allegedly failing to comply with a congressional subpoena, the IRS told POLITICO. Lawmakers on the House Judiciary Committee summoned the tax chief to answer accusations from the House Oversight panel that he failed to preserve documents Congress requested for its probe of the IRS tea party scandal. They also say he never told the full truth about erased back-up tapes containing copies of emails belonging to former IRS official Lois Lerner. Some Republicans even suspect the IRS...