As Whit pointed out, the Breck Girl brought up Cheney's daughter unbidden during the 2004 campaign. Coulter left MORE bear traps scattered around this one, and here at Leftist American Bear Trap, we believe in safety.
There is no comparison between bringing up Cheney's daughter, who has publically proclaimed her sexuality, and Edwards being labeled as something he isn't. He's married in a traditional sense, not in a non-conforming relationship.