The left has been claiming that Bush=Hitler for years now, don't see why they wouldn't take the opportunity to claim that Bush=Vader now (especially because children have a better understanding of who Darth Vader is than they do Adolph Hitler).
The Loopy Leftist at our public library branch has a bumper sticker that says, "Frodo has failed - Bush has the Ring!"
We always have a chuckle because she's too addled to realize that Dick Cheney is the Dark Lord :-).