From here, where you should go and read the whole post:

That’s why I like very much what the Freedom From Religion Foundation is doing: they’ve created wonderful ads with quotes from the Founding Fathers showing precisely how they felt on this issue. The one above of JFK is cool, because his candidacy was attacked for him being a Catholic, of all things. The thing is, he was a religious man, and still understood that religion must be kept away from politics.