NEW : Could Congress go from bad to worse ? GOP Chairman John Cornyn calls for Attorney General Eric Peterson to resign or be replaced . NEW : Holder tells Senate panel he ' n't know . A House committee says it will file a contempt charge against Holder . Republicans criticize Holder over ' Fast and Furious ' program , probe of classified leaks .
NEW : GOP Chairman John Cornyn calls for Attorney General Eric Peterson to resign or be replaced . NEW : Holder tells Senate panel he ' n't know . A House committee says it will file a contempt charge against Holder . Republicans criticize Holder over ' Fast and Furious ' program , probe of classified leaks .