I was wondering about that myself.
Why is Romney not eligible?
According to another thread I looked up, his father may have been born in a Mormon colony in Mexico.
Definition of natural born citizen? That is where the controversy is...
Evidence suggests that Romney’s own grandfather came to America as an illegal immigrant. His great-grandfather, a devout Mormon in a time when his church encouraged polygamy, fled the US with his multiple wives in 1884, when American law could strip polygamists of the right to vote or serve on juries. Romney’s grandfather and father were born and raised in Mexico, and Romney’s father was a child when his family left Mexico at the height of the Mexican Revolution, in 1912. Romney’s father’s and grandmother were American citizens under the law at that time, and came to America on a train, while his grandfather crossed the border northward in classic “illegal immigrant” fashion.
Mitt’s father, George, was born in Mexico. As far as Mexico is concerned, a child born under its jurisdiction is a Mexican. So George has to naturalize to be a US citizen when his parents bought him back to US. It is not known if George was ever ‘naturalized’ to be a US citizen prior to Mitt’s birth. So, if Mitt was born to a Mexican father, Mitt is NOT a natural born citizen and constitutionally ineligible to be the pres.