One just isn't enough. The others are back-up plans I guess.
Don't forget, the beast in Revelation has 7 heads. 3 down, 4 to go?
I've seen that "Mabus" thing too, the "ObamaBush" mush is the best they can come up with for that.
I particularly enjoy the cherry picking of the 3 sixes from his zipcode as "proof" of his evil lineage.
If they can prove his mother was a jackal, I'm so sold.