school didn't know that this had happened and they wanted more information about this, which they said that they did not get. the question is what happened to the students, we don't know, and why does this keep occurring? that is something to look at, jim. >> just incredible. in the year 2018, it is not funny. shocking to see. sarah sidner, thanks for telling us the story. >> sure. a very good morning to you. i'm jim sciutto in new york. poppy harlow is off today. his rivals have policy plans they are releasing this morning, but front-runner joe biden has the polling. today a new cnn poll shows him blowing the other candidates out of the water. his lead nearly twice that of closest rivals bernie sanders and elizabeth warren. democratic voters apparently agreeing with the biden campaign that he has the best chance to beat donald trump. that message made clear in a new biden ad targeting iowa voters.

>> we have to beat donald trump and all the polls agree joe biden is the strongest democratic to do the job. >> cnn political director david chalian joins me now live from washington. a consistent feature of the polls since he's been in the race, and really before then, is he is a front-runner with a big lead and now even a bigger lead. >> without a doubt, jim. the durability of biden's front-runner status has been the overarching story of this nomination race thus far. you showed 29%, he's back up to a double digit lead. we saw that lead narrow in our last poll immediately after the first debate. but this is the snap-back poll to where things were. sanders and warren bad or second place at 15%, and 14% buttigieg and harris round out, and everyone else 3% or below. look at the movement since the last poll at the end of june. the big movement, you see biden up 7 from that immediately --

immediately taking the punch from harris in miami. the other big movement in this poll down here, kamala harris taking a nose dive of 12 points from 17% back down to 5% in single digits around in the range where she was before that big moment. so what that shows us was that miami debate did have an impact, but it wasn't long lasting and we're seeing the race return to joe biden being the front-runner. and take a look at this notion of idealogical battle. if you're a self-declared liberal in this pool, biden and sanders and warren with all in a dead heat. but the democratic leaning patents in this poll, 34% are with joe biden, compared to 9% for standards and 7% for warren. this is a big strength for him. >> no question. so the biden campaign, even dr. joe biden, his wife making

the point yesterday at an event that this is about electability and some of that is in the numbers, is it not? the democratic voters not only prefer him, but see him as the most likely to beat trump? >> you are absolutely right. 54% in this poll, a clear majority of democrats, say they want a can't that has the best chance of beating trump, versus 39% who say they want a candidate that shares their position on the issues. this is critical to a majority of democrats and it is a biden strength. but take a look at how different demographic groups perceive this question. if you take the white non-college educated versus white college educated, non-college educated folks it actually is a little bit of advantage to somebody that shares their positions, but splits evenly. if you've got a college education, 65% want getting rid of donald trump as issue number one, 29% day shares a position on your issues. the divide gets even starker when you look at age. look at this. among people 45 and older in

this poll, 66% want the candidate that is the trump defeater. 25%, somebody they share positions with. under 45, this is where the young vote comes into play, 56%, a majority of the younger voters want somebody who shares their position versus 41% say they want somebody who can defeat donald trump above all else. >> and those older voters, they tend to vote more so maybe they have more sway. david, thank you so much. joining me to discuss what all this means, joshua green, national correspondent for broom berg business week and cnn senior political analyst at the atlantic. >> you look at this and it's been a consistent front-runner status for joe biden since we've been doing the polls. do you see this as nearly inevitable or we've got a long way to go? >> we've got a long way to go. it is kind of extraordinary with the 20 candidates how the voters

have tiered this off. at the moment you're looking at three candidates who are all white candidates, basically 70 or older, dominating the field at a time when the democratic party is more diverse and relying on millennials than ever. the structure of the race is that basically joe biden is very strong among voters who are essentially middle-aged, middle of the road and country. his advantage among older voters and more moderate is very consistent, maybe the most consistent in polling throughout this race. and i think there will be increasing notice on the left that if you add up the support of bernie sanders and elizabeth warren, it takes you up to where joe biden is. and the fact that both of those candidates are the two other strongest ones at the moment is an advantage for him. the last point worth noting is that the race is more competitive in the first two states of iowa and new hampshire because candidates are paying more attention to them. but also because biden's advantage among non-white voters doesn't come into play for two

states that are in 90% of the e lek treaty. >> you heard ron brownstein say middle-aged, middle of the road driving the support. those are the voters democrats need to win, do they not? >> they really are and that in a nutshell is joe biden's case for why he should be the democratic nominee. what's interesting to me in this poll is from the moment he got in, he's been the front-runner in every poll we've seen but the lead has gradually eroded. this is the first poll where bid biden meerably jumps up. that says to me that his appeal is more enduring than a lot of political analysts believed than even a month ago. >> imagine that, if the polls defy the political analysts. that could never happen. >> can i just add, the one thing i agree with you, because the one thing that's been consistent even when biden's lead in the

horse race has eroded in some of the national polls, his advantage over which democratic is best suited to beat trump really has not been challenged by anybody else at any point in this process and that is a big safety net. especially when you look at the voters over 45. they were 60% of all the primary voters in 2016, they were over 45. they are more concerned about electability. and if you look at some of those polls both nationally and in the states, biden leads among the voters on who is electable against trump by ten to one sometimes. so he has an overwhelming advantage and i really believe that until elizabeth warren or bernie sanders or kamala harris punctures that advantage, he is stronger than he may look at any given point in the race. >> the older voters show up at the polling booth. they actually vote. let's talk about some of the other candidates. kamala harris had a great launch, she had a great first debate. she's fallen off a cliff in this

poll. >> and what that says to me is these viral moments that drive twitter attention and fundraising, they're important but don't translate to enduring support. you look at a different candidate like elizabeth warren who has steadily gained voters throughout the primary process, she hasn't really done it with viral moments. to me that's the way to advance for democrats. harris needs to figure out a way to get back into the conversation to get voters excited about her, because clearly this poll shows that their interest level has fallen off. >> warren in these figures, she had, ron, something of a rise over the last few weeks, steady and playing a long game, all these policies are going to plan for that. this poll leveled off a bit, and as you noted, splitting the progressive vote, if you can call it that, between bernie sanders. can she jump out of that? >> look, i think the challenge -- there's no question, as josh said, she is building support i think more

steadily and she is stronger in the states by all indications than the national poll. her problem is the candidates with her profile, which is white liberals who depend mostly on college educated white liberals, have not won the nomination since gorge mcgovern. every other one, howard dean, bernie sanders, they all fall short unless they can across the racial divide and appeal more to african-american voters. she really needs -- unless she can expand her appeal, elizabeth warren needs kamala harris to recover. because the risk she faces is that even if she squeezes out bernie sanders and becomes the candidate of the white left, if joe biden is winning moderates and then black voters three to one. the math doesn't come close to adding up. if elizabeth warren cannot appeal to black voters better than her predecessors, she needs another african-american candidate to peel away some of

those voters. >> right now winning the lion's share of african-american voters is joe biden. i want to switch gears from 2020 if i can. we heard from congresswoman tlaib and omar yesterday about being banned from their planned trip to israel. have a listen. i want to get your reaction. >> we cannot let trump and netanyahu succeed in hiding the cruel reality of the occupation from us. so i call on all of you to go. the occupation is real, barring members of congress from seeing it does not make it go away. we must end it together. >> joshua green, where does this go from here? president trump has relished this, using it as a way to paint democrats as somehow across the board anti-israel. where does this go from here? >> it's unprecedented for israel to have banned two sitting

members of congress and clearly this is a fight that trump wants to stoke. he thinks that it benefits him when democrats are having fights over racial issues, over israel. but it's not clear that that's really going to help and it's not clear what is going to put a break on this process. some of the democrats i've talked to have been very upset and have talked about maybe pulling back u.s. financial aid to israel, something that hasn't been seriously discussed in years all of a sudden is on the table. so i don't think we know where this ends or where it goes next. it could be up to trump and his decisions on whether or not he wants to exacerbate this fight. >> and there are concerns in israel about support for israel. it's traditionally been a bipartisan issue. josh green and ron brownstein, thanks very much to both of you. in the wake of the two deadly boeing crashes, a global panel is making new recommendations to the faa detailing ways that it can

improve certification for planes. what will that involve and how will it make you and i safer? that's next. the president says the u.s. has the strongest economy in the world, but a new report says the white house is discussing the possibility of a payroll tax cut. if everything is fine, why the concern? and a disturbing new cnn story, huge amounts of plastic invading an entire ecosystem, destroying wildlife, all in a remote area in the middle of the ocean. how scientists are racing to stop the never-ending flow of garbage. it's a remarkable story. it's shocking. we're going to take you there. with amazing amenities like movie theaters, exercise rooms and swimming pools, public cafes, bars and bistros even pet care services. and there's never been an easier way to get great advice. a place for mom is a free service that pairs you with a local advisor to help you sort through your options and find a perfect place. a place for mom.

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making its recommendations on ways the faa can improve its certification process, this after the deadly crashes of two boeing 737 max jets. the jet liners were grounded after 346 people died aboard lion air 610 in indonesia and ethiopian flight in eegt open ya. >> ennay, what do we know about the panel and its findings to prevent this sort of thing from

happening again? >> internationally their trust was shaken with the faa after these two crashes. let's talk about this panel. it's an international panel. we do know from sources it's in its final stages of its work. this advisory panel is made up of reps from nine countries, aviation experts, also reps from the faa, and they are essentially tasked with scrutinizing how the fa asse faa certifies aircraft as safe. they've faced a lot of scrutiny following the 737 max crashes. in particular, i'm told that this panel has been looking into ways to prevent issues from slipping through the cracks. as it appears to have happened with that automated system on the 737 max, we know as mcas which automatically pushes the nose of the plane downward. i'm also told that we can expect that the panel will suggest that the faa address this reality and

safety concerns that aircraft technology is becoming far more sophisticated than the regulations that govern it. so they will have to address that reality. now, the group's recommendations will essentially look at the deficiencies and here's why this all matters. the faa certification process and its regulations are essentially the bed rock of aviation safety for aircraft. they don't just fly in the u.s., but internationally. so improving the agency's process will certainly help ensure that this sort of fatal crash never happens again. >> one of the most amazing things about this story is that the faa lets the manufacturers certify the plane. renee marshal, thanks very much. also this morning, cnn can confirm that the white house discussed the possibility of a payroll tax cut to head off a potential economic slowdown. this discussion in recent days. this is all despite the president and his advisers saying the economy is just fine.

they have no concerns about a recession. all those concerns are fake news. cnn white house correspondent boris sanchez has more details. does this reveal, boris, genuine fears in the white house of a slowdown? >> well, jim, it certainly raises the question as to why the white house is having these private conversations about potential tax roll pay cuts to try to stave off an economic slowdown when they keep suggesting publicly that the economy is doing just fine. we understand that these conversations are still in the early stages. public kplee the white house has said it isn't under consideration at this time. but all we've heard from the white house from the president's tweets and retweets, from kellyanne conway, wilbur ross, is that the economy is doing just fine. larry kudlow scheduled phone calls with business leaders this week to try to gauge their feelings on the state of the health of the economy.

the white house is concerned about the economy. we know that president trump has had conversations with aides recently about whether this trade war with china could impact his chances going into a 2020 reelection campaign. keep in mind, u.s. steel is losing jobs, rv sales are down, which is an indicator of the strength of the economy moving forward. aside from that, there's volatility in the stock market. so of course the president having touted his record on the economy as one of his strongest selling points for voters, has to be concerned about a potential recession going into 2020. aside from that, we will hear from the president today. he's set to welcome to president of romania into the white house and you can bet reporters will be asking him about these potential tax cuts. >> boris sanchez, always good to have you. thanks very much. >> will congress do anything when it comes to stronger background checks on gun sales once they return from recess? remember all the talk about coming back early? we're going to ask a democratic congress whether anything is going to get done this time.

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can you believe it? it's been just over two weeks since the shooting massacres in el paso and dayton left 31 people dead, and in that time president trump has gone from supporting stronger background checks on gun sales, remember that, to back pedaling. the president is now saying that the u.s. already has strong background check in place, and

of course an nra talking point. that has democratic senate minority leader chuck schumer hitting trump so quick, saying we've seen this before, president trump feeling public pressure in the aftermath of a shooting, talks about doing some meaningful to address gun violence, but inevitably he back tracks after fresh from the nra and the white. joining me is steve cohen of tennessee. he sits on the house judiciary committee. congressman, i went to el paso and dayton. people were asking me repeatedly will this time be different. it doesn't look like it will be. will anything get done? >> i don't think so. we're going to have a hearing on september 4 to deal with -- more extensive background checks than the bill we've already passed that's sitting in the senate, also to deal with high capacity magazines and also the red flag

laws, both summits for state governments and a federal law. we'll pass them out of the committee and we'll have to argue with the republicans. there won't be much support there. there may be some for background checks. i don't know. but the nra is against it all and so trump will be against it. i think back to the hearing he had on the parkland shooting with the white house and he acted so concerned and interested and how incredulous he was that 19 year olds could buy those weapons. and he did nothing. it's criminal to use those victims as a prop, to act like he cares, and then not to do it. >> i had something of a frustrating exchange with congressman tom reed in the last hour where i asked him about the magazine that was used in the dayton shooting. this magazine, that double drum

barrel magazine as you see, carries 100 rounds. it helped the shooter in dayton kill nine people in 40 seconds, less than a minute. and the congressman wouldn't even say that should be illegal. i mean, is there any movement from your republican colleagues on banning magazines like that? i've never seen that in the hands of a u.s. soldier in iraq or afghanistan, let alone on the streets of dayton. >> no. there hasn't been any movement that i'm aware there are not many, and i don't think we exist on our committee. so it's just an unfortunate we need to ban assault weapons, too, but that's a problem in defining the ar-15, the ak-47, exactly what it is. i think they did it in the brady bill and eventually we'll get to that, too. >> that's the thing. in the past congress has passed measures, in 1994 the crime bill

included assault weapons. i want to ask you about the economy. you have the white house in public saying the economy is just fine, but in private now discussing a payroll tax cut to help stave off even the possibility of a recession. would you support such a payroll tax cut? >> i would look at it. we did it with obama, so i would take it into consideration. but i would be concerned about it, because it would increase the debt, which i voted against the trump tax bill which put over a trillion dollars into debt and i voted against other proposals he's had, budget proposal. we're going so far out, the debt that the united states carries and china carries is hurting our economy and china's economy, which affects the world's economy. i have no doubt we're going to see a recession. what you see with u.s. steel is a response to the tariffs that were poorly thought out. the world is concerned about

trump acting on his own with these tariffs and not working with allies to try to come up with mechanisms that help our country and the world's economy. we're not independent and trump said yesterday that there are recessions in europe but we're great. if there are recessions in europe, they're going to come to america. it's a worldwide economy and if they can't buy our goods, we're going to have a recession. we all work together and he can't understand that. or he refuses to admit it. >> as a democratic, are you concerned that if the president proposes this and democrats vote against a payroll tax cut, one that they've supported in the past, and two, one that would put more money into the pocket of americans, that the president would be setting you up to say, listen, i tried to help you, democrats stood in the way? >> well, that is certainly what he could say. he's going to say whatever he has to say. the man has no conscience whatsoever and he has no understanding of the truth.

i guess it's still the morning at 3:30 when he starts to tweet. i don't think we should base our policies and our actions on what he's going to do, because he's going to create his own realities, whether it's pocahontas or whatever it is. >> wouldn't that be a fair argument to say, listen, a payroll tax cut will give you, the economy may be slowing down, i want to cut you a break here, and after all, democrats voted for this in 2011, so why wouldn't that be a fair argument? >> it's a fair argument except it causes more of a deficit down the line. it could affect medicaid and social security and we need to protect medicaid and social security. that's so important. and if you're doing something today that you're going to have to pay for tomorrow, it's not good policy. there are certain things we could do immediately, like infrastructure bill to put people to work and get goods to market. that would help the american economy and help the american worker and we need an

infrastructure bill. we need a minimum wage bill that puts money in the hands of people that are not living in poverty wages and that stimulates the economy rather than the trump tax bill to put money into the upper 1% who put it into cds or bonds and let it sit. >> before we go, i do want to ask you because you're on the record as a strong supporter of impeachment. another democratic, the fourth highest ranking democrat in the house has come out announcing his support, but still a majority of americans don't want to go there. they don't want to go there. why are democrats coming out exy step here when you don't have the public backing for it? >> well, we do have the public backing in a lot of areas. ben wray is running for the senate in new mexico and i guess the support is there in new mexico and it's certainly there in my district and a lot of districts around the country. >> not nationally.

you need a majority of americans to want it and you would also need a republican senate, by the way. >> the fact is if you have hearings -- and we're having kind of quasi hearings, but if you had a full impeachment inquiry you would develop facts and put out information concerning the mueller report and obstruction of justice and violations and other errors and mistakes and violations of the constitution of this administration that would bring the numbers up. in watergate the hearings started with about 19% to impeachment and it got to 67% or something. true, we had john dean and we had rosemary woods and you're not going to have a rosemary woods. but you could have something like that. i think if the people heard from mcgahn, and we're trying to get mcgahn to testify. we've gone to court and judge jackson will have it in his court to order him to appear. but if he testifies, if deer born testifies and lewandowski testifies, the information that trump tried to obstruct justice

might bring those numbers up to where they need to be. >> there are a lot of ifs there. we appreciate you taking your time this morning. >> you're welcome. >> it took five years for the nypd to fire the officer who used an illegal choke hold on eric garner. has justice been served now? we're going to discuss coming up. this is the couple who wanted to get away who used expedia to book the vacation rental which led to the discovery that sometimes a little down time can lift you right up.

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the officer accused of fatally using a choke hold is

out of the nypd but it took five years for him to be fired. an internal investigation found grave misconduct. i'm joined by james. james, if i could begin with you, you wrote that his firing would be, quote, a glaring miscarriage of justice. >> i look at it from the perspective of the law. it's easy to watch the video and feel passion for the family. we've had his wife and mother and children on here. i get that. but when it comes to the law we have to look at it from the perspective of due process. and before anybody thinks that i'm an unapologetic police shield, i have argued many times when police officers got off too easily on issues of brutality or the use of force continuum going too far. in this instance, i believe that with hindsight, being able to

look at this and stop the film as the deputy commission for trials and the nypd did, is unfair to the officer who was dispatched there that day to arrest somebody on what i'm sure we'll discuss is an inconsequential charges, but that spot had been a place as the new york times reported up to that point in july of that year, 98 rests, 646 calls to 911. so my only argument is we're looking at this with hindsight being 20/20. nobody wanted mr. garner to be put in a position where he was going to die being taken into dust ki but he contributed to that. his health obviously played a role, chronic asthmatic, blood pressure issues and all the other things. that's my issue. >> your argument? >> obviously of course i do. we have to stop pretending that black folks aren't human beings and so in these situations, they shouldn't have moved or shouldn't have this. they're human beings and i see

other human beings do the same thing and they don't end up dead. even if all the things he was accused of were true, he didn't deserve to be dead. and i disagree with the stopping and looking. if you do that you'll actually see that something wrong happened. this is the only profession where people die and we say there shouldn't be accountable. this turned into a choke hold and it remained a choke hold for several seconds and there was no attempt to provide medical help when that occurred. most importantly, there was no danger to the officer or the public. and in that case, you're supposed to ask and wait for your supervisor to come. >> he was not armed. should that not have made a difference? because many of these interactions the police will say my safety was under threat here. and garner was outnumbered and he wasn't armed. >> let's look at what the nypd has done throughout my career. i got to new york city in 990.

2,455 homicides, and last year you know 289. that is a 95% decrease in homicides. now, use of force is important. every officer has to be judged by an objectionable, reasonable standard. did he operate objectionably reasonable? he initially tried to do an arm bar takedown. mr. garner resisted and said you're not taking me in today. then he went behind the waist and tried to bring him down. >> you're skipping an important point, because the laws in the books say that you have to go and arrest people -- >> no, no. >> you should wait for a supervisor if there is no fear of danger or harm to yourself. >> that's not true. >> that is true. >> i was in the job for 25 years on the nypd task force. it never waited for a supervisor. >> and on top of that, there are other officers still on the force who lied on the report, who accused eric garner of selling up to 10,000 cigarettes

on the report. we have to look at it altogether. >> i appreciate -- listen, you're doing it great because you're listening to each other and i appreciate that. i want to ask you a big picture here, because there is a pattern when you have officer-involved killings, where there are at best in some cases or at least, at the extreme, administrative penalties. but very rarely legal penalties, right, where officers go to jail. those are definitely the minorities. california has just passed a law that changes the standard from reasonable to necessary use of force in these kinds of encounters. i want to get both of your views before we go. i'll start with you. do you think that's a good step what california has done? >> repeat again. >> the california governor and their state legislature passed a rule that changes the standard that allows a police officer to use deadly force from reasonable to necessary. in other words, makes it a higher standard for applying that kind of force and i wonder from a legal perspective, do you

think that makes a difference? >> i think that is important. i think we have to continue to have these conversations like this, because policing is hard. we also ask our police to do too much. i'm also concerned in new york city because there were some changes made they were looking into that makes it almost easier to use a choke hold and they are doing some use of force changes that we think may be damaging so we're looking at that in new york city as well. that sounds like it's a good step in the right direction. >> do you think that works? >> i don't necessarily disagree with that, but i think when we have reflexive legislation, let's look at the patriot act and how it looked ten years after 9/11. i think we need to be careful with that and understand. i don't know what it's like to grow up as a black man in america. you do. you don't know what it's like to be a cop on the streets in an area that is a high crime area when you never know when somebody refuses to comply, are they looking to take my life or making it hard for me to arrest

them? >> i agree with that and i don't know pantaleo. i know he's someone's son and people love him. i also know in high crime areas, they want it down more than anyone else. but someone died and an illegal technique was used and there has to be accountability. >> can i thank you for having the kind of conversation i wish we were able to have more often on a divisive and important issue but you discussed it like adults and i appreciate it. we'll have you back soon because i know it's going to be a continuing conversation. coming up, a sea of debris in the middle of the atlantic ocean. our cnn crew went there and took a deep dive looking at the extreme amount of plastic threatening wildlife in the north of the atlantic. this is a remarkable story and you're going to want to watch it. stay with us. aim to say that more with aimovig. a preventive treatment for migraine in adults that reduces the number of monthly migraine days.

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folks, you really want to watch this story. it's alarming. it's amazing. there's a rainforest in the middle of the atlantic ocean. researchers say the sargasso sea is now on the brink of devastation. small dish, baby turtles all under threat because of plastic.

cnn's senior international correspondent went there right in the middle of it and she explains why. >> reporter: it is humbling to be out in the deep blue hundreds of miles from land. we're in the sargasso sea, a free-floating seaweed dubbed the rainforest. under the mats there is an unexpected array of bio diversity, but also the shocking realization of what we are doing to it. >> look at all that. >> reporter: there are so tienier pieces, hard to see, but

everywhere. >> each time we got into the water we found countless pieces, all different shapes and sizes. most plastic is not directly dumped into the ocean. much of what you see has been discarded on land, traveling thousands of miles and breaking up along the away. the sargasso sea is the world's only body of water without shores. it's defined by the current of the north atlantic, current that also carry plastic filth, making it one of the five ocean garbage patches.

alexandra and maureen are marine biologists. the sargasso provides a habitat for baby hurtles and fish, shrimp, plus hundreds of other organisms. in the oceans degrading plastic becomes more poisonous as it binds with other man-made chemical pollutants. all the toxicity ends up in the digestive system of marine life and travels up the food chain all the way to our dinner plates. on board, amanda collects samples, part of a study into plastics in this body of water. >> you can see quite a bit of plastic and this has been fairly common in most of the samples that have been coming up. >> in most of the samples, we

have seen a lot of plastics because they get in the sargasso. >> the results of the study are alarming. in it's samples, they found similar or greater microplastic to what they found in the pacific garbage patch last year. >> we have to change our consumption and the way we do things. >> you have a son? >> yes. >> when you see the way things are now, are you worried about his future? >> yes. i am, a lot. because i think with climate change, what are we giving them? it's insane. >> reporter: being out this far from land, you can't help but be struck by how interconnected our world is and how destructive we are being to marine eco systems, and with that, also to ourselves. cnn in the sargasso sea.

>> just so harrowing there. incredible reporting right in the middle of the ocean. thanks so much for joining us today. i'm jim sciutto in new york. we always appreciate having you with us. "at the hour" with kate bolduan will start right after a quick break. fact is, every insurance company hopes you drive safely. but allstate helps you. with drivewise. feedback that helps you drive safer. and that can lower your cost now that you know the truth... are you in good hands? and with new features and richer stories,d you're from. it can lead you on an unexpected journey... ...that brings you closer to home... it's only $59 to discover your heritage...

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hello, everyone. i'm kate bolduan. thanks so much for joining me. a brand new look at the current state of the democratic race for president. just out this morning, a new cnn poll shows joe biden is bouncing back. warren and sanders are battling for second. and kamala harris, where did you