I think Republicans posing as liberals asking sexist questions about Palin's ability to raise her children and be Vice-President in hopes that people will then sympathize with her is just too complicated and subtle.

In any case, we still have Jane Smiley on the Huffington Post commenting on Palin:

"Who is taking care of the kids while she is away, including the baby? If it's the husband, I'm glad. If it's a nanny and always has been, then I want to know how a wealthy woman with a nanny helps women in general -- wealthy women with nannies are nothing new."

Presumably the same question would apply to Hilary Clinton or most women in politics.