I don't think that would fly very well for two reasons:
—1— It would be seen as a repeal, in part, of the 1st Amendment.
—2— Because Christianity is a thing that a person (not a country) is; moreover, this sounds like an attempt at legalistically declaring Christianity, which cannot be done (because it is personal-relationship with Jesus)… furthermore, I would want no part in increasing the number of goats
on the left-hand side. Let no one, ever, even think that because I am an American, I am saved
.
Nothing in there contradicts the ORIGINAL intent of anything in the Bill of rights. You also are wrong if you believe America was not founded upon the bedrock principles of the Holy Word of God. Th truth of that goes back as far as the Mayflower Compact.