Mitt Romney defended his father, George Romney, after Montana’s Democratic Governor Brian Schweitzer said the Republican presidential front runner’s dad grew up on a “polygamy commune.”

During an interview with Fox News Chief Political correspondent Carl Cameron on Friday, Romney, who is a practicing Mormon, emphatically stated, “My dad’s dad was not a polygamist. My dad grew up in a family with a mom and a dad and a few brothers and one sister.”

Saying he hadn’t seen the comment Romney told Fox, “They lived in Mexico and lived a very nice life there from what I understand and then when he was 5 or 6 years old there was a revolution in Mexico, They escaped… My dad had a very tough upbringing.”

Schweitzer made the comment in an interview – when talking about Romney’s problems with Latino voters, he said its “kinda ironic, given that his family came from a polygamy commune in Mexico, but then he’d have to talk about his family coming from a polygamy commune in Mexico.”

Romney’s father, George, was born in Mexico and moved to the US as a child before becoming the CEO of American Motors and the Governor of Michigan.