Mitt Romney addresses a touchy subject about his religion - CSMonitor.com

a time when Mormonism was under attack in the United States, resulting in state and federal legislation against polygamy, some Mormon groups – including Romney’s ancestors – fled to Mexico where they were able to continue the practice until the Mexican Revolution forced them to return to the United States.
As detailed in “The Real Mitt Romney” by Michael Kranish and Scott Helman of The Boston Globe, the former Massachusetts governor’s early ancestors did practice polygamy in North America, but that did not include his grandfather’s family in the United States or Mexico.

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