Kerry's decision to use Cheney's daughter as a political prop in the last debate may come back to haunt him. Non-parents don't seem to get the big deal but most parents I know (left or right) are pretty outraged by it. It may turn out to be the blunder that costs Kerry in Ohio which is the key state in this election.
One good article on the issue can be found here: http://thoughtsonline.blogspot.com/2004/10/james-taranto-and-others-may-be-right.html
Imagine if Bush had talked about how traumatic divorce is and talked about how hard it must have been on Kerrys' daughters when Kerry left their mother. Would that be okay? No. It would not. It would have been tacky beyond belief.
Parents don't want their kids used as fodder. It has nothing to do with the daughter being gay but rather bringing up your opponent's children in an effort to help yourself is very poor taste. And it's particularly reprehensible that it was such a blatant ploy (to the ponit that John Stewart was making fun of it) to try to appeal to the homophobe vote. There was no point in bringin up Cheney's daughter in the debate.
It reminds me of the end of the movie, The Dead Zone, where the crooked politician picks up a nearby child to use as a human child. Kerry, in essence, made use of his opponent's child as a blunt instrument and it may cost him the election depending on how much legs this story has. And I think it does have some legs. People are mad about it. It was talked about at work and on the radio and elsewhere.
If you're not a parent, you won't understand it I suspect. My wife and I were disgusted at the time. We just couldn't believe he did that. The press score, who aren't conservatives, apparently groaned when they heard him say that from the press room at the debate hall. I suspect Kerry may be groaning too when it's over. We'll see.