This was never a Christian nation.  In fact, the Constitution forbids any one religion.  The founding fathers were very clear on this point: God has no role in government; therefore, Christianity has no role in government.   Separation of church and state was only one such declaration.  

The Constitution clearly states:  
"Congress shall make no law respecting an establishment of religion, or prohibiting the free exercise thereof; or abridging the freedom of speech, or of the press; or the right of the people peaceably to assemble, and to petition the Government for a redress of grievances."

Not one of the four founding documents establishes any one religion or mentions any god: the Declaration of Independence, the Articles of Confederation, the Federalist Papers, or the Constitution.   People need to know their history.

Most of the references to God came in the 1950's.  Our Nation's government is NOT Christian.

Hilary is a Christian, and I salute her right to her religion.