“The fact that I am just learning about this, over a year into the investigation, is completely unacceptable and now calls into question the credibility of the IRS’ response to congressional inquiries,” said Rep. Dave Camp, R-Mich., chairman of the House Ways and Means Committee. “There needs to be an immediate investigation and forensic audit by Department of Justice as well as the inspector general.”

At issue is whether the IRS probes were politically motivated and directed by the White House. Congressional investigators were hoping for answers in Lerner’s emails.