Being Hillary

In a career that has spanned decades, Clinton has experienced triumphs and failures.
5:38 | 07/29/16

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Transcript for Being Hillary
Tum-tum-tum-tum-tums Smoothies, Only from tums. ? ? I'm gonna stand by you ? ? even if we're breaking down ? ? we can find a way to break through ? We gotta get back to our job. Before we say goodnight -- his past infidelities threatened to derail his campaign early on. I'm not sitting here some little woman sitting by my man like tammy wine. ? ? stand by your man ? Tammy wine was furious about that, telling reporters nowhere in that song did I say, be a door Matt. Hillary Clinton has a wealth of experience. But some say she's the ultimate insider. It's an impression the democrats sought to counter this week. She is still the best darn change-maker I have ever known. Reporter: She's been in the trenches for years, fighting for women's rights in beijing. If there is one message that echoes forth from this conference. Let it be that human rights are women's rights and women's rights are human rights once and for all. Reporter: Fighting republicans over benghazi. With all due respect, the fact is, we had four dead Americans. Was it because of a protest, or was it because of guys out for a walk one united and decided they'd go kill some Americans? What difference at this point does it make? It's our job to figure out what happened and do everything we can to prevent it from ever happening again, senator. Even her former rivals admired her endurance. And no matter how daunting the odds, no matter how much people try to knock her down, she never, ever quits. Reporter: But the flip side of that resilience is a certain amount of defensiveness. Nearly 20 years ago, she had this to say about the republicans. The great story here is this vast, right-wing conspiracy that has been conspiring against my husband since the day he announced for president. More recently on 60 minutes, she insisted she's held to a higher standard. I often feel like there's a Hillary standard and there's the standard for everybody else. What's the Hillary standard? It's unfounded, mean-spirited attacks with no basis in truth, reality, which take on a life of their own. Reporter: That may explain, but not excuse why she broke state department rules and set up a private e-mail server for her government business. Looking back, it would have been better for me to use two separate phones and two e-mail accounts. I thought using one device would be simpler, and obviously it hasn't worked out that way. Reporter: The fact that Clinton is a woman should be a plus in a country where more than half the voters are women, many of whom rightly believe it's high time for the U.S. To follow the example of other nations, Britain, Germany, Israeli, India, Pakistan, and many others, trusting the top job to a woman. But nearly half of American women view Clinton unfavorably. 48%. There is a hesitancy around women candidates. It's still there, and part of it is that you have to put yourself forward, and women find that somewhat hard to take. We were all raised that you're not supposed to toot your own horn. Reporter: There's no question she's been subjected to a different level of scrutiny than most male politicians. Her every hairstyle, every pant suit dissected for 25 years. Her shifting style, almost a Metta for Metta forfor the way she has shifted her policies over the year. Hello. Reporter: It's made endless fodder for parity on "Saturday night live." Hold up your phone and being loo natural. Kr a candidate who wants so badly to be liked. Some say she comes across as unlikeable. Citizens, you will elect me! I will be your leader! One thing that happens, she says, when she's running for office, people don't like her. When she's in office, people do. Reporter: Back in 2008, Clinton played down her femininity, emphasizing her toughness instead. It's 3:00 A.M. And your children are safe asleep. But there's a phone in the white house, and it's ringing. Your vote will decide who answers that call. Her former campaign adviser says Hillary Clinton learned a lot during that campaign. She's not made those same mistakes this time around, and I think she has a more disciplined message now. Reporter: She's highlighted her role as a mother and grandmother. Hillary Clinton is hoping to make history. Tonight she did. After all, when there are no ceilings, the sky's the limit. Reporter: But there's still one more crack she's hoping to make in that glass ceiling. I'm David Wright for "Nightline"

This transcript has been automatically generated and may not be 100% accurate.

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