You're right, but that's not even a fair comparison, since Chelsea is the daughter of a former president and the party's current presumptive presidential candidate. Bristol's mother is an unsuccessful vice-presidential candidate.
The left's obsession with all things Palin would be like Brietbart or FR conducting investigations into the sex life of Paul Tsongas' daughters (if he even has any).
And to your thinking, was Gov. Palin “unsuccessful” in 2008 due mainly to her own actions or to those of her running mate and his campaign team? I’m VERY interested in your take on that.