Anti-Bush? It takes place in the 1800's for cripes sake!
I haven't seen the movie so can't comment on it. But in a general sense you don't have to be in the same timeframe to satirize something.
*Possible Spoiler*
If the leaked script is any indicator, I don't see it as "anti-Bush" at all.
I can't vouch for the authenticity of this, but don't read on if you absolutely don't want the surprise spoiled.
The gist is that an isolated village is kept isolated by "monsters" in the surrounding woods. Second only to the fear of these monsters is a phobia of cities and towns which is propogated by the village elders.
From what I gather, the creatures are hardly seen until the third act, and the "twist" turns out to be that these are nothing more than the village elders themselves dressed in costumes to keep the villagers in line.
Oh, and it's not really the 1800's, as is discovered by the villager who finally braves the woods in search for medicine to heal her gravely wounded fiance. She apparently ends the film by stepping out of the forest onto a modern highway in 2004.
I suppose one could use the deception of the elders to keep the people subdued as an allegory of any government they disliked. That doesn't make this anti-Bush, or the ephemeral monsters in the woods terrorists or WMD allegories. It's just a movie.
The same cannot be said of Michael Moore's ignorant vitriol.
Cheers!
It never ever ends. Next up, The Manchurian Candidate. You can't tell me that on a subconscious level, this doesn't have a cumulative effect on the national psyche.