http://www.bbc.co.uk/news/magazine-17487873
Mitt Romney, the front runner in the race for the Republican Presidential nomination for the White House, is a devout Mormon, but his cousin, Park Romney, also in the past a committed member of the church, now denounces it as a cult.
"I became convinced that it's a fraud," Park Romney told the BBC, explaining his reason for leaving the Mormon fold.
The two visions of Mormonism the Romney cousins present could not be more starkly opposed.
Park Romney, 56, is a former Mormon high priest, who turned against the church.
On the stump Mitt Romney, 65, has avoided mentioning Mormonism, instead talking generally about his faith, but he has been an active lifelong member of the church.
He was a Mormon missionary to France in the 1960s, studied at the almost-exclusively Mormon Brigham Young university and rose to become first bishop, then "Stake President" (diocesan leader) in his home state of Massachusetts.
He led Sunday services, ran Bible classes for children and looked after a 4,000-strong congregation in Boston for five years in the 1980s.
Like all Mormons, he is expected to give 10% of his annual income - no-one knows how much he is worth, but it is estimated at anywhere from $150 million to $1 billion - to the Church and not drink tea, coffee or alcohol.
Committed Mormons wear special under-garments, and Romney is believed to follow this tenet of his faith too.
Park Romney's criticisms of the church are fundamental.
Along with other ex-Mormons, he questions founder Joseph Smith's prophecies - for example Smith's translation of an Egyptian scroll, part of the Mormon book of Abraham, which Egyptologists say is a fraud.
"There's compelling evidence that the Mormon Church leaders knowingly and wilfully misrepresent the historical truth of their origins and of the Church for the purpose of deceiving their members into a state of mind that renders them exploitable," says Park.
Such accusations are rarely heard in the US, a nation founded on the principle of freedom of religion.
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