I don't suggest writing all Senators/Reps in their capacity as your representatives but as members of those committees. Write them in care of the committees. We can expand the contacts later but get the leadership on board first.
Vice Admiral Lowell E. Jacoby, USN, Director, DIA
Mr. Earl Sheck, Deputy Director for Analysis, DIA
Major General Michael E. Ennis, Deputy Director for Human Intelligence, DIA
Which Deputy Director is Weldon referencing?