I think the problem that they are facing is: conservatives have already played it, and it works. SO there's a bit of "Oh, I'm Christian ... I guess I should hang out with the ones who talk about God" -- so saying "I talk about God, too!" isn't all that lothesome.
As Stephen Colbert would say: we're a Christian country! It says it right there on the dollar bill!
(except it's largely true)
/jordan