A professor at Harvard Law School specializing in legal history and property law, Mann is unquestionably the quieter half of the couple. Friends, colleagues and campaign aides say Mann has never been one to seek the public spotlight. But as Warren climbs in the polls, there may be no escaping it.

On a recent Friday morning, Mann and Bailey, the couple's rambunctious 16-month-old golden retriever, answered the side door of their Cambridge home, letting CNN reporters inside for the couple's first joint interview of the campaign. Mann's left hand was in a hard cast -- he had recently broken a bone while trying to break up a fight between Bailey and a neighbor's dog. ("Bailey got jumped, let's be clear," Warren would later insist -- she's never known Mann to get caught up in a scuffle. "Bruce went to Bailey's rescue.")

Asked about the couple's contrasting personalities, Mann, 69, responded with a smile: "It just works."

(Full article at CNN.com)