Spotted in a window of a house in the San Francisco Bay Area:

That’s Sarah Palin with monsters in her hair, Medusa-style.

The lettering was added by an adult, upon close inspection.

In case there’s any doubt that this was created by an Obama-supporting family, here’s the same sign in context in the window, with a pro-Obama sign at the top (a little hard to make out, but it’s visible).