Sorry. I have yet to hear a single comment regarding her gender.
Maybe s/he's referring to the snarky, demeaning "cleaning lady" and coffee-fetcher type of remarks from Ann Coulter and Michelle Malkin. Those aren't really things one would ever say about a man, imo.
I'm not saying their opposition to her is sexist - I don't think it is, because I think a different woman would be fine with them - but those remarks have a hint of sexism in them. And yes, women can be sexist.