That makes no sense. Bush's lack of support doesn't necessarily correlate to a bad GOP showing. Don't forget that a fair amount of those polled - presumably, assuming a decent poll - are conservatives who are not happy with Bush, but they are unlikely to vote for a Democrat in 2006.
The GOP may lose in 2006, but your statement - so goes Bush, so goes the GOP - misunderstands why conservatives are mad at Bush in the first place.
You paranoiac fantasies aside, if such a power was abused in that way, Democrats would kiss 2008 goodbye.
To be frank, it's detached attitudes like yours that have made the Democrats on the outside looking in. Lots of people are not happy with Bush - but are they think the solution is a sensible alternative, not this faux-revolutionary garbage.