We should also understand, that ongoing investigation(s) or not, various congressional committees are authorized to oversee an agency and will keep what it sees confidential, as it respects any investigation.
In other words, Rep. Cummins is shilling for the administration. Just as Rep.
Quigly did at the beginning of Issa's requests, so did Cummins when Issa issued the
subpoenas.
Jimpeel, Issa said today (04/20) that if Melson does not comply, a Contempt of Congress Proceedings will be initiated. Here's the
letter to Melson. Google contempt of congress.