more now from correspondent elizabeth prann. >> lois learner gave a full interview to the justice department. the hearing sparked a heated exchange between the chairman of the house oversight and government reform committee representative darrell issa and elijah cummings. later cummings said those actions undermine the integrity of the committee but says lerner's interview should be made public. >> i want that information. the entire committee is entitled to that information. i think the congress is. it doesn't give her immunity and does not bind the committee. it could have given us some of the information the chairman was asking about. >> reporter: committee republicans said the revelations cast further doubt on the seriousness of the justice department's so-called investigation of irs targeting,