Dear Loser,
is it a former Dem congresscritter, or a former Pubbie congressman..? former is "asshole"..latter is "honorable"
It is usually accurate to address this way:
"Dear Lobbyist,"
I usually try to turn the person's name into a nickname, and if that's not going to work "Sparky" or "Slacks" seems to work for most guys.
Then again I'm often told I'm rude and disrespectful, so take that advice for what it's worth.
Owl_Eagle
Unleash the Hogs of Peace.
P.J. O'Rourke Parliament of Whores
How about simply Mr. or Mrs.? Politicians work for us, supposedly, sometimes, rarely, never...
Dear Boooozer er uh Loser:
If he or she are politicians you agree with start with 'The Honorable', if you don't agree with them it should be 'Dear Joe', Politicians live off of ego, slap them down with not feeding them and call them by their first name.
Ask them when they are going to get the 'scooters' advirtised for the old folks on TV cause some of them are sure old enough to use them.
Office of the Clerk, U. S. House of Reps. should be able to help you: http://clerk.house.gov/clerk/index.html