Transcript for Sen. Amy Klobuchar on New Book, 2016 Presidential Race
firestorm, the FBI investigation ongoing. She spoke about it again this week and while Clinton has adjusted some of her wording about whether classified information was in her e-mails -- perhaps more noticeable, some distinct changes in her tone since the story broke. At that first press conference back in March, Clinton was resolute, defiant. The laws and regulations in effect when I was secretary of state allowed me to use my e-mail for work. There is no classified materials. Reporter: By July, a slight change in response but not the tone. I am confident that I never sent nor received any information that was classified. At the time it was sent and received. Reporter: Then, she turned to humor. You may have seen that I recently launched a snapchat account. I love it, those messages disappear all by themselves. Reporter: Then, sarcasm. Did you wipe the server? Like with a cloth or something? Reporter: Now this week a more contrite tone but no apologies. It clearly wasn't the best choice, I should have used two e-mails, one personal and one for work, and I take responsibility for that decision. Minnesota senator Amy klobuchar bush joins us now. She's a Hillary Clinton supporter and author of the new book "The senator next door." Senator klobuchar, I wants to get to those e-mails in a moment. But first, we have to talk about that poll and those Numbers. This is Clinton's lowest support in Iowa in any poll in this election cycle. Smallest lead in this election cycle. The pollsters saying, it feels like 2008 all over again. That certainly is not good for Hillary Clinton. I want your response to those polls, what's happening to that campaign? Well, thanks, Martha. Being that we're in Minnesota and that we can see Iowa from our March and I have been down there for Hillary Clinton. I have to tell you, her campaign is so much different than 2008, it has energy, it is organized. It's a grassroots campaign. When I look at those Numbers, I think of races like Michele Bachmann surging at this point. 2004, dick Gephardt was surging. I think she's running a strong campaign, she was just in Minnesota. I was in the room and saw these delegates from all over the country inspired and enthusiastic and cheering and so, I think you have to look at her energy, how she's responding to these 17 opponents that are, you know, basely attacking her daily. The campaign worry about losing one-third of their support? Well, again I think you have heard from her directly. This is not a coronation. She expected there would be other candidates in the race. You can't just waltz in and win a democratic primary. We have seen many people in the past think they could do that. And that's not what happened. I think she approached this with a vigor from the beginning, having been through this before. That she was going to be scrappy, meeting people. Okay, scrappy -- scrappy is not one of the words that they describe her in the quinnipiac poll, the language describing Hillary Clinton, let's go through this. Number one is, liar. Followed by dishonest. Followed by untrustworthiness. Well, as someone who has known her since I have been in senate, that's not how I see her. I think we have to step back a little, these debates are coming up. Americans will have an opportunity to see her in a debate format very seen. But clearly, senator, this is about the e-mails in some ways. If they're saying liar, dishonest, untrustworthy, that takes you back to this issue of the e-mails that keep dogging her, should she apologize or should she handle it differently? Well, I really appreciated the tone she had in Iowa. You played that, where she talked about how she took responsibility. I think that is the proper way to talk about it. It.there's a lot of partisan stuff that's going on that's not fair to her. In this case, she had to take responsibility for what she did and she did. She said that she should have had two different e-mails, which I think is significant here, Martha, she's going to be testifying in a public hearing in October. They can ask what questions they want. That will give the American people another opportunity to look at this. Because, when I'm at the Minnesota state fair, what people are talking about their jobs, they're talking about, can they send their kids to college? Senator klobuchar, speaking of fairs and speaking of jobs, Joe Biden, yesterday, was at the democratic jamboree in Delaware, what does that tell you? Do you think he'll jump in? Well, the last time I checked, Joe Biden is from Delaware, I think it's great he is at the fair. He'll make the decision that's best for him and his family. Okay, and I have to ask you one question about your book, it's called "The senator next door." It's not called the president next door. Any interest from you in a vice presidential choice. I wrote this book about the need for more people from Normal backgrounds to get into politics. It's a very personal memoir how I got to where I am from being a carhop at the a&w root beer stand. I read the entire thing. It's a great read. Thank you very much for joining us. That's very nice, Martha. Thank you very much.
This transcript has been automatically generated and may not be 100% accurate.