New York Senator Kirsten Gillibrand announces 2020 presidential run

Former Vice President Joe Biden has not yet made a decision about whether he will run for president in 2020.
5:31 | 03/17/19

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Transcript for New York Senator Kirsten Gillibrand announces 2020 presidential run
Thanks, Sam. This morning, we have a new entry in the race for president. New York senator Kirsten Gillibrand announcing her candidacy while other candidates this weekend fanned out across a half dozen states, and the undeclared Joe Biden making a major appearance. That's right. The former vice president speaking at a democratic party dinner in his home state of Delaware, and maybe inadvertently, revealing his intentions. ABC's Tara Palmeri has more from the white house. Tara, good morning. Reporter: Good morning, whit. It's a growing field with over a dozen candidates, but all eyes are still on Joe Biden who is slow walking his decision, but his pal, senator Chris coons said it's all but certain he'll run. Kirsten Gillibrand officially joining the crowded field of 2020 hopefuls, taking direct aim at president trump in a campaign launch video titled "Brave winds". It doesn't spread hate, cloud truth, build a wall. It's why I'm running for president and it's why I'm asking you for your. Reporter: Later she'll hold a rally outside of this hotel in New York City. In this recent des Moines register/cnn poll that served Iowa democratic caucus Goers, not a single respondent named her as a first choice, but in that same poll, Joe Biden who has yet to announce his candidacy is leading the pack. Overnight, Biden teasing his decision at a fundraiser in Delaware. I'm criticized by the new left. I have the most Progressive record for anybody running -- anybody who would run. I didn't mean that. Reporter: And calling out president trump with a message of unity. Everybody knows who he is. We have got to be clear of who we are. We Democrats, we choose hope over fear. Reporter: Beto O'rourke, after joining the caravan of democratic candidates on Thursday, hitting the campaign trail in Iowa. Just days into the race and he's already apologizing, first for a joke that he only sometimes helps his wife raise their I'll be much more thoughtful going forward in the way that I talk about our marriage. Reporter: And then addressing a new report in reuters, detailing his involvement in one of the u.s.'s earliest hacking groups and a disturbing murder fantasy he wrote as a teen. I find it now incredibly embarrassing, but I have to take ownership of my words and understand the way that they make people feel when they read them now. Reporter: It's still early in the game, but these democratic candidates are already talking about their options for vice president. Senator Cory booker said that if he has it his way, he'll choose a woman. Meanwhile, Beto O'rourke, he's saying thait will be difficult not to. Dan? All right. Well, it's still very early. They may be getting ahead of themselves. We appreciate it. Let's bring in George Stephanopoulos who will be hosting "This week" later this Never too early. That's your rule? All right. Okay. We'll take you up on that. What about Joe Biden's slip of the tongue? This guy, all but in. I think so. Listen. He could walk up to the line again and say, no. I'm not going to run, but he has been talking to potential financial supporters. Been talking to potential staff. All signs are now that he wants to get into this race, and he comes with a lot of advantages. He's likely to cross with democratic party, and they're looking for someone who can beat Donald Trump. He scores high on that as well. You saw the slip of the tongue, and one of his liabilities. That's not too serious, but he has had trouble making gaffes out on the campaign trail, and also he is running in an environment where a lot of the energy on the democratic side is with those who are far more left wing than Joe Biden has been. The question is even if he's a strong candidate against Donald Trump in the general election, can he get through the primaries? That's the really tricky dynamic. Let me ask you about Beto O'rourke. We saw in Tara's piece, doing laugh apologizing these days and he's just into the race. How do you think things are going in these early days? His strengths and weaknesses one of the things that everybody likes about Beto is he's spontaneous, casual and relatable. It worked for him, even though he didn't win against Ted Cruz, when he ran for senate last year, but he's also learning that with a presidential race, you get a lot more scrutiny. These are the growing pains of a presidential campaign. We'll see how he handles it over time. On the show this morning, "This week" this morning, you'll be talking about the New Zealand attacks and the rise of white supremacist extremism and violence. Is enough being done on this front? Are officials taking this seriously enough? That's one of the big questions I want to ask this morning. I'm bringing in two former homeland security officials. Jeh Johnson who was homeland security security secretary for president Obama, and Tom Bossert who was homeland security secretary for president trump because we now have seen and, in fact, here in the United States, there have been three times more deaths by white supremacist extremism than by islamic extremism in the last years. The question is are we doing enough to stop it? Can we control it? How do you deal with the fact this is being weaponized over social media? Big questions for all of us. Your show on Sunday mornings is one of my favorite parts of the weekend. Thank you. Always a pleasure to see you. I want to remind everybody, George has a big show this morning in the aftermath of the attacks. He'll speak with the top homeland security officials for presidents Obama and trump, and the powerhouse round table takes on the latest in the 2020 race. That's all coming up on "This week." Thanks again, George.

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

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