simple, its the hypocrisy of the republican party. they run on the basis of higher moral ground/holier then tho attitude. if this was obama daughter they would be sayin they have no morals, and if liberals like him are elected, he will spread his "wicked"/no morals to the rest of america. as they like to put it decaying american values, etc. can you imagine what rush/hannity/rest of cronies would be doing with this if it was obama/biden daughter?
secondly and more importantly, she like most right wingers support absistence instead of prevention thru safe sex/contraception. if they had it there way, safe sex woudln't be taught in school. rather they want to teach absistence. one can safely assume that absistence has failed her daughter, and would fail american teens.