That old school or club tie is frequently the one that binds. If you've looked through such references as the Almanac of American Politics , you are aware that certain interest groups publish performance ratings evaluating the votes of your targeted Member. Such contacts represent organizations that have warmed the Member's heart, praising him or her for good legislative judgment. Ask your organizational contact to write or call the office on your behalf. They've got access.
Lobbyists often enjoy friendly and respected relationships with many Members and staffers.
Get one to recommend you for an interview. Here's the real network. Staffers who know you're looking can do a lot of the looking for you. Here's a sneaky one. Have your contact ask the contributor to write the Member, recommending an interview with you.