In prime time tonight. Nightly news begins right now. Announcer this is nbc nightly news with lester holt reporting tonight from the olympic summer games in rio. Good evening from brazil and from barra olympic park after another very good day from team usa. Well have more about e start here at home with donald trump and a potential new controversy simmering tonight, starting with what was alleged a joke, but implied violence. Note that it comes as our new poll shows trumps efforts to regain lost ground have expose new weakness among what has been his stronger core of support. Halle jackson has late details. Her judges, nothing you can do, folks. Although the Second Amendment people, maybe there is, i dont know. Reporter the Clinton Campaign believes trumps suggesting violence. Saying, quote, what trump is saying is dangerous. Democratic senator chris murphy calling it an assassination threat. Listen again. If she gets to pick her judges, nothing you can do, folks. Although the Second Amendment people maybe e know. Reporter trumps team argued Second Amendment people are, quote, tremendously united which gives them great political power. A top advisor saying its totally ridiculous that trump made an assassination request. And and trump is right, if Hillary Clinton gets to Pick Supreme Court judges, theres nothing we can do. Opponent, i think most americans would say thats something we dont condone and you should not be president of the united states. Reporter a fire storm yet again for trump, new signs that the gop candidate is in trouble with his base. Everything im thinking, im going to say and sometimes some things are better left unsaid. Reporter trumps lost support with white men over the last two weeks as they begin to back Hillary Clinton instead. Our nbc news survey showing a double digit flip among white men without a college education, his most dependable source of support until now. And among all white voters with college degrees, its clinton getting stronger in blue state battlegrounds. Its happening at a time when many moderate republicans are abandoning trump for clinton or someone reporter and one of those republicans, susan collins, now says she cannot vote for trump, which may open the door for other members of the gop to do the same. Susan collins said she doesnt think that trump was trying to incite violence with his remarks, but is condemning him for his loose language. A hospital in maryland has moved its newborns in Critical Care to other hospitals after a potentially deadly bacteria was discovered. The deaths of two infants could be connected. Nbcs Pete Williams has late details. Reporter all nine infants in a neonata intensive care unit in suburban washington, d. C. Have been moved to other hospitals after the discovery of deadly bacteria for hospital newborns. The hospital says two infants in the unit have recently died. Theres been no that tells. Reporter three of the nine patients tested positive of the bacteria u but none of them showed symptoms of the bacteria. It can be deadly for newborns who dont have hearty immune systems. These infections can have grave consequences for the children. Reporter the ce control says clinics and hospitals report over 50,000 sud moan us in infections a year, 60,000 of them drug resistant. Two newborns died from it ten years ago at A Los Angeles hospital and it killed four infants in 2012 in the uk. They believe the bacteria came into the there was no end to the nightmare for thousands of traveler s today as Delta Airlines recovers from a system outage. And today the airline cancelled another 680 flights. Nbcs Kerry Sanders is at deltas hub in atlanta. Reporter tonight delta cant say how many flights have been delayed, but we do flow the number of delta flights cancelled in the last few days 1,600. Tonight there are frustrated and exhausted passengers here in atlanta and around the world still trying to get from point a to point b, including a woman wearing her wedding dress. Delta Airlines Says it has narrowed the problem down to a power surge that took out a computer module and the backup system also failed. Lester . Kerry sanders in atlanta, thank you. New questions are being raised about the safety of amusement after something went terribly wrong in a county fair in tennessee. Two girls are in the hospital after plunging off of a ferris wheel and another boy was injured in kansas. Reporter a ferris wheel basket overturned at tennessees Greene County fair. We have had a Major Incident at the ferris wheel. Theres been at least reporter three children plunging more than 35 feet. I didnt think it was such a big deal. Most people rock it anyway. Reporter this accident follows the death of a 10yearold boy at a water park in kansas. The National ConsumerProducts Safety Commission estimates 7,000 people went to Emergency Rooms last year for ride related injuries. There are no federal regulations for Amusement Rides and specifics vary widely across the country. 24 states have programs. And nine states have partial oversight and six states have no regulations. We need consistent regulations, consistent standards across the board. We need these protocols and we need them now. Reporter the International Association of amusement parks and attractions tells nbc news safety is its top priority, saying theres no evidence federal oversight would safety of the industry. Third party inspectors were brought in today to look at all the rides. It looks at this point that it was mechanical failure that caused this. Reporter tonight the rest of the fair is open, as investigators try to piece together what went wrong. A representative for the company that owns this ferris wheel says its thoughts are with the family of the girls who were injured, they range in age from 6 to 16 years old and tonight the youngest remains in critical condition, gabe gutierrez, thank you very much. Lets move to Rio De Janeiro and it has been a big day for team usa here, it could be a spectacular night as the americans look to make even more history. Were not going to report any results that havent already been widely reported. But ahead of our prime time action, we can tell you, as expected, the american womens Gymnastics Team was golden. This as the biggest names in u. S. Swimming are getting set for giant races reporter the american women keep setting the bar. Its critical, this combination. Reporter team usa led by simone biles, the smallest athlete with the biggest impact. Today the first ever back to back team gold. Moments ago, simone biles on the win. I felt like i would cry, but im too happy to cry right now, but it definitely feels russians fighting to make the podium, theres backlash from their doping scandal every day. And youre hear boos as team russia comes out. Reporter the backlash came to a head last night. She is one controversial figure along with an entire country. Reporter swimmer yulia last night. King exploded through the water and off the wall. The american beating the russian. Striking gold, making the statement in thewater and taking a stand out of the pool. We can still compete clean and do well at the Olympic Games and thats how it should be. Efimova called it politics and the open hostility sad. The tension with rival south african chad le clos. Le clos still continues to look over at michael phelps. Reporter both men easily qualified for the 200 meter butterfly, le clos, the defending champ, phelps, the greatest ever. Tonight gold is on the line and history is at bay. With many complaining about traffic the venues, ticket sales havent a problem. And once people get inside, theyre witnessing the best athletes on the plant. Were getting a rare look this morning at striking images inside a city under siege. Fighting as escalated in syrias largest city between the Rebel Coalition there and Government Forces and now the u. N. Is warning of a humanitarian disaster with some 2 Million People cut off from running water. Reporter in a city of ruins, the most intense fighting in five years. Its rebels against the regime, neither able to win, neither willing to give up. And caught in the middle in aleppo, more than a Million People. Like this man. Screaming, where is my son . His child buried, dead. The u. N. Today called for a cease fire, warning of a controversy. The last ful d a month ago. But the u. N. s plea may fall on deaf ears because rebels in regimes aim to encircle and destroy each other. They each control half of aleppo. Rebels broke a regime seize just days ago, strike is relentless. This teacher sends updates every day. Its slaughter without mercy, this mans wife lies dead before him. Then he raises his arms for the body of his baby son. Babies are born into a world of dust. Aleppos only miracle is that anything is left standing. Syrias oldest city, dying like the people in it. Bill neely, nbc news. And theres more to tell you about as we continue here tonight. Some say she may be the best of all time, were at home with a superstar american gymnast, simone . . The ford freedom sales event is on our biggest event of the year just got better . . Announcing zero for seventytwo across the entire lineup of ford cars, trucks and suvs. And freedom to choose with ford. Americas best selling brand. . . Now get 0 financing for 72 months across the entire ford lineup, plus specially tagged vehicles get a thousand smart bonus. You dont let anything keep you thats why you drink ensure. Sidelined. 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Back now from rio, where the final five as theyre being stage today, the usa team whos being led by simone biles. She was too young to compete in london, so many at home may not know her. But thats about to change bigtime. Heres nbcs stephanie gosk. Reporter no one flies higher, performs harder routines or wins more. Simone biles has completely upended the sport of gymnastics. They call that uncomfortable. Reporter more than that few call simone, 49, 19yearold a little uncomfortable. I just dont feel like im up to the expectation yet, so i kind of just blow it off. Reporter what makes her even more remark is her story, simones mother struggled with drug and alcohol addiction and her father was never really there. By age 3, she was in foster care. I got a call from child were in a foster home in ohio. So i said send them to me. Reporter not long after adopting them, simone was jumping off the walls, the furniture and just about everything else. She was so tiny and it scared me to death, but it did not scare her at all. Reporter there was no other option, at age 6, she started gymnastics. The kids at school could never do like always do them on the playground, so i thought that was pretty cool. Reporter simone and her sister are both gymnasts so they are extremely close. Family meals are a chorus of giggles. Like most teenagers her bedroom is her sanctuary, lots of trophies and lots of medals. She has a life sized er you come in and give him a little kiss . Yeah, its a little strange. Reporter that playful spirit is a big part of who simone is. Watch as she outruns a bee at the 2014 world championships. Even facing the pressure of rio, she manages a laugh. The bar is high for rio, thanks to yourself, is that inspiring or terrifying . I think its a anybody down, but exciting just to know that i have done and accomplished so much. Hopefully i can continue to do that. Reporter simone biles has four more chances to win gold, shes heavily favored to win all of them, if she does, shes got the record. Certainly one of the most talked about athletes here at these games. Were my belly pain and constipation . They keep telling me drink more water. Exercise more. I know that. Try laxatives. I know. Believe me. Its like ive. Tried. Everything my chronic constipation keeps coming back. I know that. Tell me something i dont know. vo linzess works differently from laxatives. Linzess treats adults with ibs with constipation, or chronic constipation. It can help relieve your belly pain, and lets you have more frequent and complete bowel movements that are easier to pass. Do not give linzess to children under 6 it may harm them. Dont take linzess if you have a bowel blockage. Get immediate help if you develop unusual or severe stomach pain, especially with bloody or black stools. The most common side effect is diarrhea, sometimes severe. 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We bring you one of the untold sto rugby team which scored a big win today and takes the field against tomorrow. Our ron mott talks with the man who has been called the fastest in the sport. Reporter its a big part of what still motivates him today at age 26. If i quit, then they win. Reporter growing up, he had good reason to think he didnt measure up. Foster homes, couldnt read. A bleak start for certain. I had a picture i wanted to paint for myself and my life and i wasnt going to let anybody dab my paint brush in their paint because then it would become theirs. Reporter now a run away sensation in a sport few americans know, not just pretty good, fastest in the world good. In rio, he and an upstart American Team hope to go home with a respectful showing if not a medical a of course the reminders in writing, on his tattoo that didnt go over so well with his mom, who adopted him and his sister when they were 7. I was like, what are you doing . And its a big old necklace that says focus, but that was his words of determination. Hes a hard worker and when he wants to do something, he goes for it and he doesnt give up at all. Reporter that drive and rare athletic tam lent left one gym owner in awe, he paid for his training. Reporter the pitch is his canvass and carlo nils is ready to create a masterpiece. It didnt matter how much money you have, no matter how many parents you have, you dont have to be your circumstances. You can change your picture how you want it changed. Its up to you. Rio. Thats going to do it for us on this tuesday, it will be a big night for swimming and gymnastics, im now at 7 a teachers aide facing rape charges. Anchor a community remembering a jogger murdered in princeton. State Police Investigating hundreds of tips. Reporter tracking a risk of showers and storms tomorrow. Heat and humidity to finish the week. Anchor a make or break night anchor Training Camp trouble in foxborough a patriots receiver injured. Anchor and possible head night gone bad. The red sox plan to honor big poppy. Anchor so why was tonights give away sent back. 7 news at 7 starts now. Anchor a community searching for answers after a jogger is killed in princeton. The body of 27 year old vanessa