But the real reason for their current power is that they have managed to make it the "Christian American" movement in the minds of many people. To the point where many people who agree more with the Democrats on specific posistions vote Republican because they think it is the Christian thing to do.
At the core of the "family values" debate, the vast majority of Americans have judeo-christian mindsets. So, when the dems talk about "allowing gay marriage", this is immediately rejected by this part of the populace. BUT, if you were to change the term marriage and discuss equal benefits for same sex couples...you would get further. BUT, the dems allowed and flaunted the "gay marriage" thing...with the folks in San Fran making the news and allowing their "fringe" to drive this voting block away.
Another part of this was the hammering in the debate of the VPs daughter. It was obviously a staged attack. It offended this block's sensibilities. Not necessarily by bringing out some "kneejerk homophobic response"..but for attacking a mans family to try and gain position.
And then there's Mike Moore. Giving him a promiment position in the party workings does nothing to swing opinion of those hoping the dems are closer to center.
They aren't looking to vote for anyone because its "the christian thing to do"...their looking to place votes with a party that they think more representative of their ethic...and the dems have blown this lately because of their allowance of the fringe to make such a spectacle of themselves.
The Repo side has their lunatic fringe too...but you don't see the head of the southern baptists sitting next to George Sr. at the convention (as an example)