Seeming as a lot of Americans will automatically disqualify a candidate if they are not christian, I see no reason why a candidate for an election should have to reveal their religious status. It is ultimately irrelevant to their politics, and could even kick voters in the arse if they vote for the obvious worse candidate because they are not atheist.
If more of us valued food and cheer and song above hoarded gold, it would be a merrier world. - J.R.R Tolkien