Wrong question! I guess I can stop waiting for some member of the media to actually challenge and educate Mr. Santorum on the real issue here. The United States Constitution — as written by the Founding Fathers — specifically requires that there be no test for religion for holding public office.
To be the president of the United States Article II, Section 5 of the Constitution requires only that a person to be a natural born citizen and at least 35 years of age; and Section 8 even gives that person the option of making an affirmation at the inauguration instead of taking an oath on a Bible. You do not have to have any faith at all to be president of this country.
The Founding Fathers felt so strongly on this topic (having seen the evils wrought by government “sponsored” religion back home) that they specifically spelled it out. Article VI, Section 3 states “. . . no religious Test shall ever be required as a Qualification to any Office or public Trust under the United States.”
If some member of the media did challenge Santorum on this, or at any time analyzed this issue properly, I would love to hear about it.