That Makes Sense
Part of the left-wing blogosphere's claim that Sarah Palin faked her pregnancy was based on her daughter missing school and people at the school saying the daughter was pregnant. It turns out that she (the daughter) is pregnant. It also appears that this was known by the McCain team and that it didn't matter. Obama has come out and told everyone that families are off limits. That's a good move for him and I don't think the pregnancy will have a big negative effect on the campaign.
On the subject of families off limits, I think that kids are definitely off limits. Spouses too, unless they make political statements about the other side, then they are fair game. Endorsing your spouse and talking about them as a spouse - off limits. Attacking your opponents - game on.