Because *apparently*, everyone who plays D&D supports Obama, because we're all basement-dwelling degenerates.
Fortunately, some people who actually have the clout might point out the flaws at the heart of that argument. http://wizards.com/default.asp?x=dnd/4n
That's one of the fundamental problems with the McCain campaign--they're old fashioned. They don't keep track of how society evolves.
Anyone who was at PAX this weekend knows that gamers are just everyone. And actually, in many respects, gamers are the COOL people--whether those cool people wield guns or not.
Cheers
