house oversite committee chairman darrell issa is asking for information about who in the white house is using personal e-mails to conduct official business. bring in dan lothian for more. issa is going after the white house again. what is this about? >> reporter: he is going after the white house again. he is especially concerned that by the admission that some white house staffers have used their private e-mail accounts for official business. and that that has happened often. so he sends a letter to the white house chief of staff, jack lew, requesting the names of white house staffers that used private e-mails this way, also requesting copies of those e-mails. he is arguing that when it comes to transparency, the american people have a right to know, and in the letter, he is citing comments made by stephanie cutter, the president's deputy campaign manager, used to work here at the white house, she made her comments during an interview here on "the situation room" on wednesday. >>...