Well, we live in a society where this is the norm:

But to be more on point, I can give you this example specifically between Clinton and Sanders showing a gigantic, sexist double standard during a debate:

The moderators spent several minutes questioning the candidates about the 1994 crime bill. Both candidates have been criticized for supporting the bill. And both were asked about it, but not in the same way. Clinton, who was First Lady at the time, supported the bill but did not vote for it. Sanders, who was a congressman at the time, did.

Question for Clinton: Given [her] support for the 1994 crime bill, why should black people trust her to end the “era of mass incarceration?”

Question for Sanders: Was [his] vote for the 1994 crime bill a mistake?

As you can see in the captions above, both of these questions are what we could call a leading question: the type of question you aren’t supposed to ask as a journalist.

Clinton, whose level of trustworthiness has been a topic of much contention throughout her campaign, got a question that forced her to begin from a defensive position. Sanders was given a pass with a question framework that sets him up to acknowledge that his vote was a simple error of judgment. All he has to do now is answer the question in the affirmative; the audience has already been primed with the idea that he didn’t mean to vote for the crime bill. These questions assume that Clinton is the enemy, while Sanders is a well-intentioned grandpa.

— The Insidious Subtle Sexism From So-called Liberal Progressives

Beyond that, though, I recommend you read through the MetaFilter thread about the original article. It’s chock-full of smart, insightful perspectives on this and related aspects.

For instance: did you know that her detractors keep saying Hillary is “unlikeable” when everyone who has met her or worked with her says she is incredibly likable? And that Bernie’s supporters vouch for his likability even though he is known by people who worked with or for him as a massive jerk? Weird double standard that the pervasive narrative on likability is damning of the woman, while the opposite is true, and supportive of the man, again while the opposite is true.