Here is a song by Dave Lippman (touted as "The world's only known singing CIA agent") who I had the pleasure of meeting after one of his performances in Aiken, SC last weekend. His performance was great - he played the part of a CIA agent to a tee. Afterwards he came out as Dave Lippman and the transformation was as complete as any that I have seen. The audience was laughing the entire time, despite the otherwise serious nature of his songs.
The 12 Days of Bush-mas
You can find more of his songs at:
http://davelippman.com/mp3s.html
And of course there's the main site at:
http://davelippman.com