The UK is a more secular country and religion plays only a small part in the role of the Prime Minister. The Queen, of course, is already head of her own church though. But strong belief in religion is sometimes seen, not as a beneficial thing, but almost an excuse for some of the actions taken. The latest leader of the Labour party is an open atheist.
Does the same apply in the USA? What would the reaction be, if the POTUS said they were either atheist or agnostic? Would it have little impact or would they be chased from office?
Actually, I wonder what would be the effect if the POTUS was C of E?