Bush has yet to realize, but only because his is not the brightest bulb on the block, that the Republicans are now riding the tiger of the Christian Right, and dare not dismount. Karl Rove knows all about this but is arrogant enough to think he can handle the reins...
The Republicans saddled up on this tiger decades ago and have occasionally took a chance and jumped off when they realized that by being too closely associated with these rabid fanatics would be cutting into the true God of the Republicans: $$. During the 90s the Christian Right complained long and hard about being ignored by the Republicans when the latter realized they were alienating a lot of Mr & Mrs Middle America.
With Bush's first run for the White House the Republicans, desperate to wrest the WH from Democrats went out and made a LOT of promises to the CR trying to once again woo them. The Republicans were amazingly successful - too successful. They and the powers of the CR went out into America's "outback" to beat the bushes, driving out the ignorant, the poorly educated, the disenfranchised. People who find America moving on into the 21st century and desperately want to pull it back to the 1890s.
Now they have a monster on their hand. A monster that has been slavering for decades to rule over the lives of Americans and now sees it's time is finally at hand.
Such a semi-theocratic state would of course be absolutely disastrous for the Republicans true love - the almightly dollar. Tens, if not hundreds of billions could easily be lost if the Christian Right actually got a toe-hold in the courts, congress, etc. Wielding the big stick the CR will surge ahead at the State level attempting to start up little local theocracies.
If you think this can't happen ask yourself this - how the hell did the XVIII Amendment bringing about Prohibition ever happen?