I believe it originated with an old field WDP was involved with in the early days. It was called Who Dares, Plays. That is the most likely explanation I can think of.
Some Invaluable Words of Wisdom:
A wise man's heart directs him toward the right, but the foolish man's heart directs him toward the left.
“If you're not a liberal at twenty you have no heart; if you're not a conservative at forty you have no brain.”
-Sir Winston Churchill
"Lousy Democrats."-Homer J. Simpson