This is the reason:
Secrets of the "Reagan Democrats
Karl Rove: Stayaway Christians Almost Cost Bush Election
Like it or not Christian conservatives are a big voting block in this country (20 million) and Bush does not owe (as you would say) "the religious right" anything. But if Bush wants to get reelected and not go down in flames like Bush Sr. didthen he better listen to them.
Then he has a very limited future unless the religious right is as much into conservative hypocrisy as he is.
All one has to do is to "look at what he has done, not at what he says" and you will see a Repubicrat who's actions scoff at the Constitutional prescriptions that he is "supposedly" wanting to "conserve(ative)."