In order for a law, measure, or policy to not violate the Establishment Clause of the First Amendment, it must not conflict with one of he three prongs of the test developed in Lemon v. Kurtzman, 91 S. Ct. 2105 (1971):
1) the government action must have a secular purpose;
2) its primary purpose must not be to inhibit or to advance religion;
3) there must be no excessive entanglement between government and religion.
See also: County of Allegheny v. American Civil Liberties Union, Greater Pittsburgh Chapter
Don't bother with facts, Sky is off on one of her "I hate Christian " rants. Already pointed out to her that in order for the US to become a theocracy it would require several Amendments. Something a President has nothing to do with. She has yet to explain to us how electing Perry or Bachmann would equal 218 congresspeople, 51 Senators and majority of voters in 37 States.