Hampshire just six days from now, donald trump is talking about a doover in iowa where he came in second place behind ted cruz. In a twitter tirade, hes accusing cruz of playing dirty tricks to pull off mondays win, but trumps not the only candidate sounding off about cruz who is busy barnstorming through New Hampshire with a wind at his back and apparently a target on his back. Nbcs Hallie Jackson tells us more. Reporter while republicans push ahead in New Hampshire, Donald Trumps looking back to iowa, sparking a new feud with the man who beat him there. Ted cruz didnt win iowa, trump tweeted. He stole it. Adding either a new election should take place or cruz results nullified. Its one of trumps harshest attacks, less than 48 hours after one of his most gracious moments. I want to congratulate ted. Reporter trump echoing complaints from ben carsons campaign accusing cruz staffers of dirty tricks for insinuating or on caucus night trump calling it voter fraud on boston radio. One of the most disgusting things, said he was quitting the race and to vote for him. Reporter hes calling you a cheater, a fraud. Does this cross the line for you . Listen, donalds insults get more and more hysterical the more and more upset he get. Reporter do you think they are fun . I think they are very funny. I wake up every day and laugh at the latest thing donald has tweeted because hes losing it. Reporter cruz isnt under any investigation, but late today carson said hes not laughing. Its clear that there were people who tried to take advantage of a situation, who tried to distort information. Reporter cruzs rivals piling on bullet. Being a pro i think it goes back to what i said before and that is the willingness to say or do anything, in this case spread a false rumor about ben carson. Reporter marco rubio, trump and the rest of the field now focused on organization, trump beefing up his with seven phone banks, volunteers from four states here, the frontrunner so dominant in recent establishment candidates may need a hand, and jeb bush is asking for it. Get back in the business of creating a more peaceful world. Please, clap. Reporter tonight bush and the rest of his republican rivals have a little less competition. Rick santorums expected to drop out tonight and rand paul suspended his campaign today. Many of his libertarianleaning backers in New Hampshire here expected to shift their support to ted cruz. Lester . Hallie jackson, thank you. The democrats, meantime, are trading some of their sharpest attacks yet in New Hampshire, even though Hillary Clinton was declared the winner in iowa, albeit by a thin margin, the sanders camp says he got a huge fundraising boo. After the caucuses, 3 million in just 24 hours. We get more from nbcs andrea mitchell. Reporter the New Hampshire is heating up with the candidates today going after each other as never before. So i hope we keep because if its about our records, hey, im going to win by a landslide. I am for a positive, progressive, economic agenda agenda. Reporter taking aim at this sanders comment to nbcs kasie hunt after clinton called herself a progressive. Reporter do you think hill shill a progress sniff. Some days, yes. Except when she announces that she is a proud moderate, and then i guess shes not a progressive. I think it was a good day for progressives when i helped to get 8 million kids health care. Reporter barely avoiding an embarrassing defeat in iowa, clinton comes to New Hampshire behind by double digits. Can she repeat her 2008 comeback win over barack obama . I listened to you, and in the process ive found my own voice. Reporter this time her campaign is trying to lower expectations against the vermont senator. This is a steep climb in New Hampshire. This is Bernie Sanders backyard. Reporter that prompted sanders to say clinton was insulting new i think that that argument, that the only reason that were doing well hopefully here in New Hampshire is because were from a neighboring state is not totally true. Reporter also attacking her for make big money in the past from paid speeches, wall street banks and colleges. Earning 200,000 plus, ive got a real problem with that. Reporter pressure is on sanders. If he doesnt do well here, the road gets tougher for him in nevada, South Carolina, and beyond to super tuesday with more minorities, many backing clinton. And tonight bill clinton is campaigning in South Carolina for his wife as sanders has just become a tougher challenger, he got secret Service Protection for the first time today and dozens of clinton aides have driven here from brooklyn now to be here for this campaign and she is now delaying a planned fundraising trip to boston. She will stay here in New Hampshire now through the primary. Lester . Andrea mitchell with the debate stage behind her and a and Rachel Maddow will moderate the democratic debate on msnbc tomorrow night live from the university of New Hampshire in durham at 9 00 eastern time. Theres late word that the criminal Sexual Assault case against Comedian Bill Cosby will move forward. A judge has thrown out a defense motion to dismiss the case which dates back to 2004. Nbcs Stephanie Gosk is outside the courthouse in norristown, pennsylvania. Stephanie . Reporter good evening, lester. Well, the defense team for cosby was trying to get this case thrown out, claiming that the District Attorney in 2005 promised their client that he would would never be charged criminally for the Sexual Assault of andrea content having him sit by for a civil deposition, however the judge heard two days of testimony from that District Attorney saying he didnt find enough evidence to prosecute the case and also said he wanted to to give Andrea Condon some form of justice but a the judge said that there was not a binding process not to the prosecute and this case will go forward. You can expect cosbys team to appeal that decision decision. Stephanie gosk, thank you. Now to the midair mystery over what blew a giant hole in a passenger plane over somalia. Could be a horrific accident but there are growing fears it could also be caused by a bomb on board. We get the latest on the investigation from nbcs keir simmons reporter moments after an explosion ripped a hole in the cabin of a commercial airliner, oxygen masks flapping as it descends from 12,000 feet, people on board claim a burning man was sucked out while most passengers stunningly calm walked safely away. I heard a big bang and smoke erupted, you know. We couldnt see anything for a few seconds. Reporter tonight experts are studying the images for clues. Its evident from the pictures that the failure of that fuselage happened from inside out. It looks like it originated inside the cabin and blew the structure outward. Reporter could it have been a bomb or a failure of the plane . A united 747 from honolulu lost part of its fuselage in 1989. Passengers torn from the seats, while in 2011 a southwest flight from phoenix to sacramento lost part of its roof. Metal fatigue was blamed. Then theres attempted terrorism, richard reid tried to detonate explosives in his shoes on a 2001 miami flight, and in 2009 Omar Abdulmutallab hid explosives in his underwear. The device failed. And in somalia from this weeks flight took off told nbc news no shrapnel has been found and the cause is unclear but the country is home to al qaeda dark linked extremists and they a plane last year. Had the occasion occurred closer to the fuel tanks this plane might have suffered the same catastrophic fate. Key simmons, nbc news, london. Back in this country across the south, millions of people are facing Severe Weather once again after a series of tornadoes caused widespread damage last night, and as nbcs jacob rascon reports one of the hardest hit areas was the small town of collinsville, mississippi. Coming right at us. Reporter there was no time to be afraid, many say. Only time to run. This door here is just blown out. Reporter pastor wade ricks and his wife julie jumped under a desk and prayed. What is the prayer . Lord, save us. Save us. Thats what she prayed, over, just, lord, save us, and and he did. Reporter the church where they were hiding, however, was not saved. All three buildings torn to shreds, but First Baptist there is a lesson in the rubble. Its what this storm is about. Were going to learn to walk with god, and youre going to see whether we really believe what we say we believe. Reporter nearby a neighborhood in shambles. For some there is little worth saving. Vicky hartley and her husband had just moved in. This is it. This is the workshop where i was, yes. Reporter the only room untouched. Was just a roar and a lot of shaking. Reporter and Severe Weather is on the move. Flash flood watches or warnings for more than 20 million americans along the east coast with whiteout conditions and icy roads in south dakota, following days of heavy snow. In the south dozens of damage destroyed homes and left roads impassable. 92yearold luna farrell had to be rescued from her home by boat. Will you rebuild it . Oh, yeah, well rebuild. Reporter in collinsville they survived a tornado that destroyed their everything, but not their faith. Local Authorities Say it is amazing that in all of the tornado damage in the south nobody was reported injured or killed, and tonight in this region already so battered by Severe Weather there are new reports of tornadoes and the threat continues overnight. Lester . Jacob rascon tonight, thanks. With zika cases on the rise in florida, today governor rick scott declared a Public Health emergency in four counties, and while theres concern about the virus impact on the summer olympics in rio, brazilian officials have a more immediate challenge, protect being the millions of tourists arriving for carnival this week. Rehema ellis reports on that effort from the city thats the epicenter of this outbreak. Reporter its just after dawn in recife, and the battle is raging against the vehicleacarrying mosquito. Health Department Workers armed with tanks full of pesticide rushing to it works very quickly and soon all the mosquitos are flying around will be dead. Reporter attacking the mosquito problem here is a big priority because this weekend these streets will be filled with more than a Million People for carnival. Without protection, all of them are vulnerable. These tourists knew the risks but came anyway. Bug spray, try and prevent getting bit. Reporter and hes going to need it. Like many mosquitos they breed in water and flourish in unsanitary conditions. Unlike other mosquitos, this species bites during the day instead of spiking at dawn and dusk. It also lives inside homes and can survive under beds, on walls and in closets. People provide it with everything it needs. In fact, you often will not find this mosquito unless theres a large enough human population to sustain it. Reporter these mosquitos were widespread in the americas during the efforts, including the insecticide ddt, drastically cut their population by the 70s, but now they are surging again. Today the battle plan from Health Officials in los angeles. Eliminate mosquitobreeding conditions. That means taking buckets, flower pots, trash, recyclables and getting rid of them. Standing water is where mosquitos lay their eggs. Reporter Scientists Say the hotter it gets in brazil and elsewhere, the greater the risks these mosquitos can spread disease. Rehema ellis, nbc news, recife, brazil. Real estate heir robert durst is now one step closer to a murder try. Durst pleaded guilty in new orleans today to illegally possessing a firearm. The gun was found when durst was arrested last march out of concern he would flee the country. Under a plea deal, durst will be sentenced to more than seven years in prison. 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Thats three times i ended up in the hospital, probably overdosed more than that. So you live every night in fear. I was afraid to leave my home. Reporter their home is london dry, an idyllic new england small town, but if you start asking around at janies cafe, youll find out quickly almost everyone here knows someone struggling with addiction. Owner janie turk had recently. Hair season everywhere. I remind these kids, that you know, when you have an addiction, you fight that for the rest of your life. Reporter at the london dry Fire Department last year they responded to 82 overdoses, almost three times more than the year before. If i saw one or two a year, that was a lot, and now with upwards of one almost every shift there is definitely a problem. Reporter now clean for two years and a new dad, joe hears of another death from heroin almost every closest friends from high school are dead. I can see thats hard. Just losing people that, you know, its its preventible. Reporter finding treatment in New Hampshire can take six weeks or more. Its why sue soon and joe drove to Hillary Clintons event the next night. What do you want to hear from each and every one of them . I want to hear that they are going to do something thats going to provide treatment, and i know that we things going on in this world, but whats going on in our community is a war, too. Were losing our kids. Reporter a war in the small towns of New Hampshire and beyond that they want the candidates to see. Kate snow, nbc news, londonderry, New Hampshire. When we c moderate to severe Crohns Disease is tough, but ive managed. Except that managing my symptoms was all i was doing. And when i finally told my doctor, he said humira is for adults like me who have tried other medications but still experience the symptoms of moderate to severe Crohns Disease. And that in clinical studies, the majority of patients on humira saw significant symptom relief. And many achieved remission. 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Since making his public debut, hes provided plenty of memorable moments, and we get our own look tonight with peter alexander. Reporter americas favorite toddler, now ready for his closeup. At washingtons inside baie baies exhibit today working on his dismount, chasing our cameraman and politely taking a pass on sweet potato. Thats an inquisitive bear. See if we can give him a new toy to occupy him. Reporter with a name that means fresh treasure this bear is a gift for the millions who have clicked to see him and researchers monitoring his everywhere. Whats he like . He has a really open personality. Hes very inquisitive. Hes very curious. Reporter just five months already enough panda portraits to fill an album. That stick of butter now 25 pounds but still melting hearts, and as importantly helping scientists save a species. Are they active . Are they sleeping . So they are looking at individual behaviors for each animal, but they are also look at how they interact. Reporter that interaction between baie baie and mom emjong very instructive. Learn for how the beloved bears take care of their cubs. It takes a village to raise a panda including 60 volunteers on shifts glued to the panda cams. Meticulously making notes every minute, even though the puff ball sleeps 20 hours a day. For leslie wilks, ten years here, more than 1,500 hours. Theres a lot of sleeping, but then you see bears being bears. Reporter while dad recently broke the internet in his snow day getting 55 million views as he helps take scientists take pandas one step further from extinction. Peter alexander as Washingtons National zoo. Thats one cute baie baie. Thats going to do it for us on this wednesday night. Im lester holt. For all of us at nbc news, thanks for night. A new firing range is coming to roanoke. How it will surpass others in the state. Plus. A convicted killer continues to make headlines. Why the subject of a popular