today's threat of litigation from you guessed it, donald trump, who was in tampa, florida tonight at a rally. on twitter today, trump issued an you will may tum to ted cruz. jim acosta is now live. what is the mood like there so far? trump promising a shift in tone to be more positive and more attacks including a lawsuit threat. >>. >> well, that's right, jim. a few moments ago, donald trump on stage at this rally said his campaign is a message about love and he's the messenger. not a lot of love on the campaign trail. as you mentioned there's the tweet that trump sent out earlier this afternoon in which he threatens to take ted cruz to court if the texas senator does not cease negative attack ads and other sorts of dirty tricks he's accusing ted cruz of carrying out in south carolina. he has been retweeting his supporters questioning the texas senator's canadian birth. so far at this point, jim, donald trump has not mentioned ted cruz yet. he has gone after jeb bush at one point saying he's asleep at the wheel, calling him gutless. this is florida. remember, jeb bush was the governor of florida. this is not trump holding back by any stretch of the imagination. the other thing we are listening for at this rally, which start ed a little while ago, last night trump vowed to clean up his rhetoric no more foul language. jeb bush said trump's language is a sign of his insecurities. marco rubio is saying he can't explain trump's vulgarities to his kids. so far we have not heard coarse language from donald trump here at this rally in tampa, but he is letting loose and going off on jeb bush as you may hear now, talking about all the money that jeb bush raised during his campaign, how much he spent and how it is not amounting to much in the polls. we will see if he brings up ted cruz and the feud they are having but so far he hasn't done it yet. he is dogging it now actually. >> you hear the boos in the background. listen to what he had to say. >> okay. >> evangelicals in the united states. i won in new hampshire. i won with the evangelicals, we won. so find out. yesterday, i just heard, we always talk about china and the president of china, our trading partner, our wonderful partner. they copy the f-35 plane. right? you know about that? you hear about that? you can't tell the difference. they copied our plane and they did more than that. i guarantee you they have everything they need right down to the most complicated mathematical solutions, all done, 100%, stolen off our web. and they -- that's right, hillary gave it. the guy says hillary did it. maybe maybe it was stolen from the e-mails. >> speaking of cruz, his campaign pulling the new ad today because it featured a previous adult film actress. you expect trump to seize on that as an opportunity tonight? >> well, it's certainly an opportunity for donald trump. he hasn't done it yet. we talked to his campaign earlier today. they didn't bring it up. it runs counc counter to some o cruz's strategy today which is to call attention to some of donald trump's coarse language. he was saying that earlier today. a little ridiculous for donald trump to come after me and ask about negative attacks when he can't control the language he uses on the campaign trail. obviously there's an ad out there that is a little risque. that may be something that ted cruz is being asked about in south carolina. and my understanding it came up earlier today when he was talking to reporters. this is vintage donald trump tonight, jim. we are inside an arena on the campus of the university of south florida that is packed all the way to the rafters. roughly 10,000 people in here and donald trump is going through attack line after attack line, mentioning building a wall on the border with mex eco. these are the lines that his supporters come out to hear every night. every one of these events he delivers them and the crowd eats it up. it is vintage donald trump here tonight. >> we can hear the energy behind you, jim. as we were mentioning not only does ted cruz has have the lawsuit over his head but also one of those campaign ads off the air after finding out it featured a former adult important actress. the cruz camp reacted to the latest attacks from trump. politics and porn, all in a day's work. >> i voted for a guy who was the tea party hero on the campaign trail. >> reporter: this campaign ad is backfiring on ted cruz. >> maybe you should vote for more than a pretty face next time. >> on the air waves less than 24 hour s and ranked off the air by a cruz campaign after it was revealed this actress in the ad is also an adult film star. ame amy lindsay has appeared in movies with racy titles, insatiable desires and carnal wish. she landed a spot in an ad after auditioning in an open casting call and is disappointed in the cruz campaign for pulling it off the air. >> shocking to be honest with you. like what? >> reporter: ted cruz responded for the first time today putting blame on the casting company. >> because we would not have cast her had we known that history. it was inadvertence in terms of the casting agency that we brought in the actors. >> the controversy as the cruz campaign in south carolina is making a play for evangelical voters. cruz trying to move past the episode while appearing as a conservative christian university bob jones. >> we decided that prudence dictated pulling the ads. so we did. >> amy sland is a christian conservative and an undecide voter herself. deciding between donald trump or ted cruz. she said that she thinks the campaign was too skittish in pulling the ad to save face among evangelicals. >> i have gotten a lot of support on the right from people that the ted cruz may have acted hastily. >> reporter: cruz's team facing scrutiny from donald trump who tweeted "ted cruz doesn't clean up his act, stop cheating and negative ads i am considering suing him. >> cruz down played the threat and called it amusing. >> it is a more than a little irony of donald trump calling anyone that. given what comes out of his mouth. >> joining me to talk more about the cnn political commentator and washington correspondent for the new yorker, cnn political analyst and new york times. we have seen a lot in this campaign and haven't yet seen the porn actress and now we have it. is this a story of the day? does it have a staying power? >> i it this has staying power because cruz took the ad down and turned it in to a bigger deal than it had to be. i mean, what do you think donald trump would have done if he ran an ad and they found out this actress had some racy movies? he would have said, no way i'm taking that down. >> play it more times. >> play it more times and frankly, his supporters would have cheered. i think cruz made a mistake here. he acted defensive and why can't this woman star in an ad that has absolutely no -- nothing to do with sex or anything in her past? i think it is completely ridiculous. >> maggie, let me ask you because in terms of senator cruz's voting base, particularly in south carolina, heavy reliance on evangelicals, i can imagine his thinking. do you think this was a mistake, or makes sense in terms of who he is aiming for, particularly in the next primary i think he is worried about having every evangelical voter possible. donald trump is leading in every poll handedly in some of them. he needs a perfect storm of votes. i think that what was in his mind when he did that. the language is absolute on certain topics and being a purist in the eyes of evangelical voters is one of them. i agree i think it made it a bigger story. i don't think we would have been talking about it if he had not pulled the ad. as always happens with donald trump, he senses weakness and moves in for the kill. what's what you saw with the tweet. >> talk about another weakness donald trump is sensing here. this tweet, let's show it, donald trump tweeting if ted cruz doesn't clean up his act stop cheating and doing negative ads i have standing to sue him for not being a natural born citizen. let's start out legally. does trump have legal ground to sta stand on a potential lawsuit? >> i think he does. what is clear a citizen, a voter does not have standing. you can't just walk in to court and say ted cruz is not eligible, excuse me, to run for president because he is not a natural born sit sinn. the courts are clear on that. in other similar circumstances like in state legislatures where one candidate maybe doesn't live in the district, the courts have said the opposing candidate does have standing to challenge him. i think trump does probably have standing. now, i do think that on the merits trump would lose the case. i do think that ted cruz is eligible to be president, but if he were to file a lawsuit, that would probably bring ted cruz's campaign to a virtual stand still because federal courts don't deal with these issues overnight. it would take at least a month and probably longer than. we are in the middle of february. the delegates will be decided in the next few weeks. i think this is a threat that has some teeth. >> that's -- you know jeffrey is a smart guy. he knows the law. saying he has legal standing on this and two it could drag out, of course considering the next month we are coming in to with super toouz tuesday coming up. it is interesting because trump had been laying off of this for a while. he talked about cruz's citizenship in the past and dropped it for a bit. how serious do you think the prospect is for this cruz candidacy? >> the 4r5u9s that are out there right now, there's one in alabama and a couple of others. and they are just by voters. if trump wants this -- i think part of trump's strategy early on may have been encourage lawsuits by others to see if he could get traction. jeff's analysis that those voters don't have standing so it has to be a candidate who would lose something to do it. you know, trump is unpredictable rable. i don't know if he will do it or not. he is at 35% in the polls in south carolina. he's close second place in iowa, smashing victory in new hampshire. he is sitting in good shape right now. he's the most likely republican to win the nomination. i don't know if he necessarily needs to file a lawsuit to beat ted cruz. >> maggie, you look at the tweet from trump. it's essentially a threat, right? saying if he doesn't clean up his act he's going to sue him. do you think it's a sign the trump campaign is getting more concerned about going up against cruz in south carolina? we talk about trump sensing weakness here, is this, in a way, a sign of weakness from the trump side? that they feel the need to do this. >> i think trump is sensing cruz is concerned and he's trying to keep the pressure on and trump is trying to make himself seem like the victim here. trump is doing negative ads against me. he did this thing against ben carson who caused me votes in iowa which has been the stance for him for a while. they pulled the ad on wednesday and said we are going for a positive message. tonight they are up with a tough ad. it is not against any other candidate. it is about undocumented immigrants and about a case where an undocumented immigrant killed a teenager in los angeles in 2008. it's a pretty tough ad. this is where trump is trying to make that others are going after him. he's a victim of the establishment. i would be surprised, candidly, if a lawsuit is ever filed. he is unpredictable but he is predictable in that he doesn't like to spend his money in great amounts as he tells us and that would be costly. >> one final thought. >> i don't think it would be that costly. one thing that donald trump values is aggression. he files a lawsuit, let ted cruz try to explain. let him try to defend he is a natural born citizen. that will occupy a lot of his time and energy and that would be a good thing for donald trump. >> i'll believe it when i see it. >> the legal aspect, soaking up a lot of oxygen. >> great to have you on, as always. coming up, the actress who was in that ted cruz ad who has some adult films on her resume. i will speak with amy lindsay about what he thinks of the fallout from the campaign ad. next, questions about a photo that bernie sanders uses in his campaign. he says it shows him at a civil rights sit in but it may not be him after all. if a denture were to be put under a microscope, we can see all the bacteria that still exists. polident's unique micro clean formula works in just 3 minutes, killing 99.99% of odor causing bacteria. for a cleaner, fresher, brighter denture every day. ugh! heartburn! no one burns on my watch! try alka-seltzer heartburn reliefchews. they work fast and don't taste chalky. mmm...amazing. i have heartburn. alka-seltzer heartburn reliefchews. enjoy the relief. 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>> i knew it was an ad for a republican candidate. that much was clear from the writing. obviously you saw the commercial. so like i said it was clear this was going to be a republican and conservative, which is who i am and what i stand for and believe in the message. so i was excited to be doing a commercial for a republican candidate. >> i want to get to that. that's something our viewers should know. that you are a conservative republican. in doing an ad like, this was there any screening process? did they ask you about your background, about the types of movies that you had done in the past or just sort of pick you for the role and slot you in? >> well, you come in and audition and there are many, many people that are trying out for this role. they were handed my head shot and resume on the back. i don't know if anyone read it or looked at it. someone recognized me from the commercial in about 30 seconds. so i wasn't hiding anything than did not ask me. >> understood. to be fair, and again to our viewers, you have a long background in acting and we want to be clear that's not the only films and roles you have done. i want to play for you a little bit about what ted cruz said regarding this. let's have a listen. >> it happened that one of the actresses, who was there, had a more colorful film history than we were aware. we had a casting call. she came and auditioned and we did not realize her film history when we did we decided prudence dictated pulling the ads so we did. >> to remind our viewers you describe yourself as a conservative republican. you are evaluating these candidates, including ted cruz as this happens. do you think his campaign had a legitimate reason to take this ad down so quickly? >> kudos to ted cruz for labelling it colorful. clearly in the media the last couple of days i have been called different things. i will take it as a compliment. ted cruz has handlers and media experts and they have every right to do what they feel is right to win this campaign. he has a job to do. i had a job to do. i have no beef or no hard feelings toward the campaign. to be honest with you, but at the same time i think it is an interesting slant, that people would look at, this is someone who could be a ted cruz voter. that's not what you are hearing. you are hearing they are all white males over the age of whatever and christian fanatics and gun toting. i'm a pretty liberal, socially leaning person but i do have my fiscally conservative views. i think that should be interesting. this is the face of the new republicans. that is what i would personally do with this whole attention. >> before i let you go, do you have in a favorite candidate in this race at this point? >> i do. >> are you going to tell us? >> not today. >> okay. that's your right. amy lindsay, we appreciate your taking time to answer our questions. >> thank you so much for having me. appreciate it. questions about a photo that bernie sanders uses in his campaign. he says it shows him in a civil rights sit in but it may not be him after all. we will talk about that after this break. 72% of women say they often make healthy choices. but up to 90% fall short in getting key nutrients ... ... from food alone. let's do more. add one a day women's ... ...complete multivitamin. with vitamin d and calcium to help support bone health. one a day. this just got interesting. why pause to take a pill? or stop to find a bathroom? cialis for daily use is approved to treat both erectile dysfunction and the urinary symptoms of bph, like needing to go frequently, day or night. tell your doctor about all your medical conditions and medicines, and ask if your heart is healthy enough for sex do not take cialis if you take nitrates for chest pain, or adempas for pulmonary hypertension, as it may cause an unsafe drop in blood pressure. do not drink alcohol in excess. side effects may include headache, upset stomach, delayed backache or muscle ache. to avoid long-term injury, get medical help right away for an erection lasting more than four hours. if you have any sudden decrease or loss in hearing or vision, or any symptoms of an allergic reaction, stop taking cialis and get medical help right away. ask your doctor about cialis and a $200 savings card it's a picture you may have seen before the race. a young bernie sanders in the '60s sit in. he has it in a campaign video and talked about it on television. one problem, it may not be anymore the photo. no one is disputing he was at the sit-in but in a campaign where securing the african-american vote will be crucial, mistake about a decades old photo may not be as simple as black and white. tom foreman reports. >> reporter: in one explosive moment, bernie sanders long claims about defending minority rights, especially in the '60s came in to question when civil rights icon john lewis said -- >> well, to be frank, i don't want to touch you off but i never met him. >> reporter: sanders from largely white vermont has heard such critiques before. despite ample evidence he was a civil rights activist in college, organizing protests, getting arrested. >> this is you in 1962. >> who's that handsome young guy. >> reporter: he told msnbc he demanded his own university change racist policies. >> stop keeping your housing that you own segregated. stop segregated housing at the university of chicago and later i got involve with segregated schools in the city of chicago. >> reporter: even that photograph is complicated. although it is in his campaign, he is leading us to believe it is him take charge of the demonstration, a caption on the university archive identifies the handsome guy as another student. sanders has undeniably taken up issues many times that matter to african-americans, health care, judicial reform and maintained ties to al sharpton. helped jesse jackson win vermont when he ran for president and helped sanders campaign for the senate. the naacp has given sanders extremely high marks. >> no president will fight harder to end the stain of race anymore the country and reform our criminal justice system. >> reporter: one member of the congressional black caucus is saying john lewis never saw sanders at the high of the '60s struggles because lewis lived in the southeast. no matter how good your eyesight is, congressman ellis says, if you are standing in alabama you can't see people in chicago. strangely, the comments may not help hillary clinton much either. after he slammed sanders, he said he did meet bill and hillary clinton but it appears that meeting took place some 20 years after the heyday of the civil rights movement. >> the human spirit, may it never be extinguished. ♪ >> reporter: by then, bernie sanders had recorded a musical to the civil rights era. but for critics in this fierce political battle, none of that seems to matter as they insist his record is little more than a song and dance. tom foreman, cnn, washington. so what is the campaign's take on this? joining me now is bernie sanders campaign manager. jeff weaver. we appreciate you taking the questions. i want to give you a chance to respond to this. is that senator sanders in this photo? we're going to show it again at the sit-in chicago in 1962? >> today the photographer of that photo and another photo which is also bernie with the university president which is featured in our advertising came forward and said he took the foe itos and that is in fact bernie sanders in those photos. >> so the campaign confident despite the fact you have this research done that showed a different name in the caption that this is indeed him? >> i think there was some confusion at one point by some relatives of somebody else. but the photographer himself, who took the actual picture said that is bernie sanders. i was there. he named other people in the room. we're 100% confident given that that that is him. >> you stand by the ad. i want to ask you about another topic. this is something that senator sanders said in the debate last night and it has gotten a lot of attention. when he told secretary clinton "you are not in the white house yet yths." some are comparing it to candidate obama an you will remember in 2008, the likable enough hillary comment. he took criticism for it being a bit caustic. does senator sanders regret saying that line last night? >> i haven't spoken to him about it. i would note given your comparison then senator obama became president obama. so look, that debate last night was an excellent exchange on the issues and the differences in the candidates on the issues. by and large until the last minute and a half or so it was substantive and the democratic voters deserve a substantive and sharp contrast between the candidates on the issues. i think that is appropriate in this process. so that voters have the conversation to make a decision. that being said, at the end of the debate, you may recall secretary clinton resorted to taking personal shots of senator sanders on the way out of the debate that. aside, the debate i thought, other than that, was a great contrast between the way the democrats are debating in the race opposed to republicans who were engaged in mud slinging politics. >> let me ask you about another moment in last night's debate. secretary clinton argued that people really don't know who senator sanders advisers are on foreign policy. on that question, can you say tonight who are senator's foreign policy advisers other than lawrence core who was assistant secretary of defense under president reagan. >> that's a good one, right? he has been senator since 2006 who's in the house for many years before that. 50 different foreign countries, met presidents, prime ministers, kings and queens and princesses around the wompltd he has a strong list of foreign policy and will be getting a list out about foreign policy advisers. >> can you give us a couple of names. henry kissinger is not among them. >> that's for sure. and mother jones exposed not only does secretary clinton rely on former secretary kissinger for advice on foreign policy but also vacation together and what have you. i think last night you saw a different approach to foreign policy. i think democratic voters are not interested in an interventionist type of regime change foreign policy that we have seen from secretary clinton and henry kissinger. >> we will look for the list of advisers when the campaign is ready to share. it thank you for joining us tonight. >> you got it. thank you for having me. >> a quick programming note, in case you missed it, cnn will replay the democratic debate. that is tonight at 10:00 p.m. eastern. just ahead, we will talk to our panel about the bernie sanders photo flap. how big of a deal is it for his campaign and his credibility? 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>> it doesn't put an end it to. there are people who say it is not bernie sanders. there were people at the event 0 who say it is not bernie sanders. i'm not convinced it was. the campaign said the cameraman say it was. they don't confirm it was but someone else confirms it was. at the end of the day it doesn't matter. it doesn't matter whether he is in the photo but whether he has an agenda for the african-american people that is stronger than hillary clinton. >> i want to ask what your position is on that. do you believe he has enough background -- and i will ask you as well, angela, but while you bring it up does he have credibility with african-american voters? >> that's an interesting question. i think his economic plan and vision of america is inclusive of black people and has a significant amount of teeth it to. bernie sanders has not done an effect i have job of targeted policy for african-americans or talking to african-american communities up until recently about race-specific issues. to that extent i'm worried he's a little tone deaf. it doesn't mean he is not or is the right guy but just a little tone deaf right now. >> angela, watching the debate last night, bernie sanders when he was asked if race relations would be better under his presidency than under barack obama and he replied absolutely. is it possible he got a little over his skis there to say he would be better than the nation's first black president? >> i think it is possible. the bigger question is what mark was talking about is what he will do specifically to heal the divide in this country on race relations. i know there are folks on the conservative side of the aisle that blamed president obama for the worsening of race relations and conditions amongst black and white and brown people in the country and they are blaming him because he is a black president not because the racial issues that exist in this country because he is a black president. the other thing we have to ask bernie sanders in the campaign is who is in the room that's going to help you set the policy agenda for people? you don't want to do it for people without involving their voices. bernie sanders, who in your cabinet looks like the face of america that would help you to set an agenda for black and brown america? i think these are the questions we need to ask bernie sanders and also hillary clinton. i know some of her senior policy advisers but i want to know if she is in the room and helping. >> on the sanders campaign, i want to get to the hillary clinton campaign on this question, but some noted the interesting timing that just now, the run up to south carolina you have bernie sanders now doing things like stopping in harlem, eating with al sharpton. from the perspective of the black community, are these efforts to connect with black voters a little staged, too little too late? >> i don't purport to speak for the entire black community. i can say that black voters have long memories. studies and reports show that black voters think of the candidates that have been there the whole time and those who have not. bernie sanders has been doing a fourth quarter push that has some raising their eyebrows. hong kong hong kong has been a long distance runner but some of the race has been troublesome. again hillary clinton was supportive of the crime bill and three strikes, in welfare reform, prison litigation reform. being a long distance runner having a connection to black people is insufficient if the connection is flawed. >> angela, in that vein, michelle alexander wrote a powerful piece entitled why hillary clinton dunn deserve the black vote. she writes "hillary clinton believes she can win this game in 2016 because this time she's got us." . the black vote in her back pocket in effect. is there a sense among -- i don't expect you or mark to speak for all african-americans but to give your sense of the view here. that she and her campaign are taking their votes for granted. >> i don't think they are taking votes for granted. i would say that to mark's point, hillary clinton is a shrewd politicians and effectively played the game well. you saw yesterday the endorsement of hillary clinton. that is because of relationships that exist and have existed for a long time. that's not about taking votes for granted. that's about being smart where the next election will be held. right after that you are going to south carolina. she needs the note votes and to her point, 100% she does not deserve the black vote. but she better earn the black vote. just like bernie sanders and donald trump, ted cruz and the rest of them. >> we will see any indication of that in south carolina. thank you very much. great to have you on. ahead, a cnn exclusive, new allegations that state officials failed to act quickly to find the source of a deadly legionnaires you break in flint, michigan. an outbreak that began shortly after the city switched the water supply to save money. ugh! heartburn! no one burns on my watch! try alka-seltzer heartburn reliefchews. they work fast and don't taste chalky. mmm...amazing. i have heartburn. alka-seltzer heartburn reliefchews. enjoy the relief. i'm in charge of it all. business expenses, so i've been snapping photos of my receipts and keeping track of them in quickbooks. now i'm on top of my expenses, and my bees. best 68,000 employees ever. that's how we own it. othis highly sought-after device "nafrom progressiveool. can be yours for... twenty grand? 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[ laughing nervously ] ♪ [ pickles whines ] i know, it's like they're always on television. what? people tried to enjoy dinner at an ohio restaurant for attacked with a machete. they are investigating it as a lone wolf terror attack. we have more on the bloody, brutal crime. >> reporter: the attack happened at the nazareth middle eastern restaurant in columbus, ohio. >> someone pulled out a machete. >> reporter: a man with a machete attacked and injured four people, one critically. >> table in front of me. started to attack people sglichlt thought it was a personal thing and he started down the road hitting everybody with something. yopg. it was people bleeding. >> official says the attacker is 30-year-old mohammad barry. somali origin and drug-related criminal record. the fbi is looking in toiz po *- to his travel and potential links to jihad. the restaurant is own by an israeli christian. the attacker was inside the restaurant asking an employee about him. >> i understood that he left, came back 30 minutes later and then attacked a person and started to slice up people in the booths. >> reporter: people inside the restaurant fought back. some throwing chairs, another confronting the suspect. >> nobody inside. from the people that we spoke to, whether it be some of the patrons or the employees, nobody said they knew him. >> the suspect fled driving off with multiple police cruisers chasing. >> he's trying to get out of the vehicle. he's getting ready to go in. he's moving in. >> police got the suspect to stop. he tried to escape out the passenger door with his weapon. >> he had a machete and another knife in his hand and he lunged across the hood at the officers with another officer in a cruiser fired a couple of shots at him. and put him down. >> reporter: one person initially critical, was rushed in to surgery and now in stable condition. debra fay. flint, michigan is in the spotlight for all the wrong reasons. the water poisoning has sparked national outrage. we have been pointing out the disaster. a switch in the water supply to save money exposed thousands of people, including children, to lead and other toxins. concerns were raised immediately but officials waited 18 months to take action n. in the meantime, lead levels in some of flint's children doubled and tripled. that's not all. not even close. shortly after the water supply was switched people started to get sick and dieing from legionnaires disease. 87 people fell ill, nine died. tonight in an interview, a county worker says those deaths could have been prevented. officials had not dragged their feet in identifying the source of the outbreak. >> reporter: in the summer of 2014, people in flint started dying in what would be one of the worst outbreak of legionnaires disease in u.s. history. >> we were suspecting those cities water supply. >> reporter: after the city began to draw from the corrosive flint river, brown water started to flow from taps. >> that was the big red flag. >> reporter: eventually toxic lead would be discovered, but that summer the county health director hadn't found the source of the legionnaires disease, which by that point was already killing people. so he got in touch with the cdc. >> when you reached out, what did you expect to happen? >> we expected that we'd have a team of people that would help us identify the source of this bacteria, the source of this illness to stop it. >> reporter: but that didn't happen. the centers for disease control, the federal agency tasked with investigating outbreaks, didn't show up. the county health director jim henry said michigan state officials purposely kept them away. >> our whole team was angry. it was -- you could see that it was an intentional, deliberate method to prevent us from doing our job. rfr according to cdc protocol, a state must invite the cdc to investigate an outbreak. michigan did not do that a. >> the state stopped our investigation by prohibiting us to communicate. they prohibited communication between the centers for disease control and again sjen see coun health department. >> legionnaires thrives in warm weather and henry said he was racing against the clock, trying to prevent another outbreak. hoping the cdc would come and pinpoint the cause. >> it was infuriating. >> reporter: michigan state officials did provide assistance but never found the cause of the outbreak. the state would not agree to an interview, saying only "we were able to meet the epidemiological case investigation need in the county. cdc was a part of these conversations, as they were vfed in many aspects of the investigation." . but the cdc tells cnn it felt a comprehensive investigation was warranted and offered to further assist michigan. in this case, michigan felt they had the skills and resources needed to perform the investigations themselves. as the weather warmed in 2015, just as henry feared, there was a second wave of cases but to henry's astonishment, the state had declared the legionnaires' outbreak over. when you read that, what did you think? >> there must be a mistake. we had two new cases in june, we had multiple cases and to determine the outbreak over must have been a mistake. >> reporter: that's what you thought at the time? what do you think now? >> it you intentional to stop the investigation that would implicate the flint water system in the outbreak. >> reporter: by sum eers end, four people would die. including 58-year-old debra. she got sick after visiting the er for a migraine. she didn't know there were high levels of leonella in the water. >> sara, every time i learn more about the story it is alarming. i understand the cdc did finally make it to flint. >> yes, jim. they were invited by the state. they were there last week. experts say it is likely to light late to make any scientific link. so to this day they still do not know the exact cause of this outbreak and they may never know, jim. >> incredible. still don't know. thank you very much. we'll be right back. can try staples tech services next day guarantee. it's fast and done right. i'll do that instead. that's not protocol marsha. in by noon, out by 5 the next day. staples. make more happen. two words: it heals.e different? 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