This comes from Aaron Blake at the Washington Post:
The fact that fully 24 percent of Republicans say that Clinton's gender makes them less likely to vote for her is pretty striking. Of course, the number of Republicans who were going to vote for Clinton anyway is tiny. Blake has an explanation for why this number would be so large: "When these Republicans hear the name 'Hillary Clinton,' their impulse is to say 'no' in whatever way possible-even if that means saying that her gender is a problem for them. They might never have considered what a female president would actually mean, but they know they don't like Clinton. Hence, 'less likely.'"
Maybe. It's also possible, even probable, that there are a lot of people who do have a problem with Clinton's gender but won't say that to a pollster. That's called "social desirability bias," and it comes up on many kinds of poll questions. They know it's considered inappropriate to say that you won't vote for a woman, even if you probably wouldn't. How many of those are there? There's no way to know.
But sexism is going to be like a driving bass line to this campaign, underneath everything all the time, and occasionally breaking out for a noticeable solo. I've said for a long time that her candidacy is going to bring out some of the ugliest misogyny that you can imagine, just as she always has. It'll come from the conservative media stars like Rush Limbaugh, and from the odd GOP operate or officeholder here and there, and it will work to her advantage by turning moderate women away from the Republican candidate, whether he actually does anything to encourage it or not.
You can bet that Clinton's pollsters are going to test and probe and examine and assess the question of her gender to within an inch of its life. We'll be able to see the results of that research in the way she talks about it, both when she gets asked and when she gets confronted with it in less polite ways. For instance, here's an incident that occurred in January 2008, when a heckler got up and started chanting "Iron my shirt!" at her (he even had a sign saying the same thing), and she was perfectly forthright about what was going on:
So in the past she's never been particularly shy about talking about sexism. But in this campaign I wouldn't be surprised if she pursues a strategy of discussing it gently-not dismissing it, but being careful not to sound like she's complaining, and mentioning it just often enough to keep it salient among women voters. Not that she'll need to wait too long before it comes up.