The Internal Revenue Service has been looking the other way instead of rooting out fraud when people apply for taxpayer identification numbers, Treasury Department investigators said, exposing a shortfall with both financial and national security implications.

According to a FederalNewsRadio.com report, a member of Congress who sits on the House's tax-writing committee responded to the report by calling on IRS Commissioner Douglas Shulman to resign, claiming the IRS is helping illegal immigrants defraud the government.