To whom it may concern: The non-profit ‘5 Calls’ makes it easy for you to reach your members of Congress and make your voice heard.
They research issues, write scripts that clearly articulate a progressive position, figure out the most influential decision-makers, and collect phone numbers for their offices.
All you have to do is call.
In case anybody stumbles upon my comment later and is also looking for the answer: I had much better luck today calling their local offices (not the DC offices).