Does it really matter if he is or not?
Yes....our country was founded upon Christian principles, not Communist ones or Muslim ones....what a President believes in should matter...
When you start to mix anti-American beliefs with American politics you can create threats against our American way of life.
The Founders owned slaves, bred with their female slaves, smuggled illegal products into the colonies, fought against the dominant church of the colonies (Anglican) of the time, owned taverns and made their own liquor, grew tobacco and sold that drug illegally over seas and drank more per capita than any other generation of Americans.
Are those the Christian principles you speak of?
The United States Government was not founded on ANY religous principles.
They argued that one over 200 years ago. The proponents of a religous influenced government lost.
Get over it. Your ancestors did a LONG time ago.