What Makes Her Stay With Him?

As Elizabeth Edwards becomes the latest political wife to stand by her man in the face of adultery, Good Morning America takes a look at what drives women to stay when wedding vows are broken. And Edwards' conundrum—like that of Silda Wall Spitzer, Hillary Clinton, and an estimated 22% of all women—may be more about power in the marriage as well as a commitment to political dreams.

"It can be a sign of tremendous power. Your husband just came in with their tail between their legs,” says an anthropologist. “You're suddenly often in a time of tremendous power to make all kinds of deals. You've been working for that dream for years and years. There's so much more to the marriage.” (More Elizabeth Edwards stories.)