In the Huntsman Corp. headquarters below Red Butte Canyon, Peter Huntsman, the younger brother of Jon Huntsman Jr., President Obama’s outgoing ambassador to China and the 2012 presidential field’s prospective incoming candidate, pointed at family pictures and explained the link between the potential GOP rivals.

“My grandfather, David Haight, my mother’s father, he was an apostle and he grew up in Oakley, Idaho. And, if I have this right, his best friend growing up was George Romney,” said Peter, the 47-year-old chief executive of his family’s multibillion-dollar chemical company. “So that’s where the Romney-Huntsman line started.”

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