Check out this post on Brad Friedman's site. It's all from a local Republican elections mailer sent out in Virginia. Let me preface this by acknowledging Brad as one of the best and most important bloggers/investigative journos out there.
The back of the envelope features a pic (above the words "AMERICA MUST LOOK EVIL / IN THE EYE / AND NEVER FLINCH") that Brad says is Obama, which ties in with the reference to the "Democrats who want to control Washington" line inside the mailer, and would also be a natural deduction given the mailer's design color... brown, like Obama's skin such as in this photo.
However, that's not Obama. It's Osama bin Laden. Notice how the original photo has been tinted a la the infamous O.J. Simpson photo on the cover of Time.
I showed the image to a colleague of mine who also thought it was Obama at first, no doubt overtly influenced by the sepia tint. By his and Brad's--and surely the intended recipients'--erroneous IDs, a subconscious connection is made, which is exactly what is intended.
Clever trick, righty ratfuckers. And an old one too. You bastards never quit, do you?