President Obama has tapped a retired corporate restructuring expert to oversee the Internal Revenue Service. John Koskinen oversaw the overhaul of mortgage buyer Freddie Mac following its near crash during the financial crisis and served as deputy director of the Office and Management and Budget under President Clinton. In a statement, Obama called Koskinen “an expert at turning around institutions in need of reform.” The IRS has faced scandal over its scrutiny of certain political groups who applied for tax-exempt status.