Do you want the state religion of the US to be Christianity, buz?
Ah but as those of us from a country with an established Church can tell you from bitter experience you
can't have Christianity as a state religion.
You have to pick which version of Christianity you want. We slaughtered many thousands over a few centuries (not to mention installing or toppling a variety of monarchs) over whether we would be Roman Catholic or Protestant. Actually not just Protestant but Church of England (Anglican or Episcopal as I believe it is known in the rest of the World).
If you were to get a Christian theocracy in the US in the short to medium term I imagine it would be a united front of Evangelicals but shortly afterwards you would see internecine warfare of the sort not seen since religion was totally dominant in Europe.
If on the other hand it were to happen in the (much) longer term then I suspect demographics mean it will be the Roman Catholic Church.
Oops! Wrong Planet