Wait until you see her now. And hidden migraine risks. Why so many women are getting them. Doctors saying knowing the reason is a key to fighting them. Nightly news begins right now. Announcer from nbc news World Headquarters in new york, this is nbc nightly news with lester holt. Good evening. Its often said that words matter, and tonight its Donald Trumps words under scrutiny as part of a criminal investigation by sheriffs officials in North Carolina. Nbc news has confirmed that authorities are looking at whether trump or his campaign incited a supporter to attack a protester at a rally in Cumberland County last week. Violent clashes between Trump Supporters and protesters have become more frequent, reaching a new level on friday night in chicago when bloody fights broke out after a trump rally was abruptly cancelled. Lets start tonight with nbcs katy tur. Reporter donald investigation tonight as a North CarolinaSheriffs Office confirms it is looking at whether statements made by the candidate constituted inciting a riot after an africanamerican man was sucker punched at a rally by a trump supporter in fayetteville last week. The attacker, a 78yearold white man, also threatened to kill the protester. The next time we see him, we might have to kill him. Reporter trump telling nbc news hes considering legal help for the attacker. Ive actually instructed my people to look into it, yes. Reporter temperature surrounding Trumps Campaign only getting hotter. Hey, hey, ho, ho, racist trump has got to go. Reporter anger outside trump rallies. Boiling over inside. Trump fired up. Get them out of here. And his surrogates spoiling for a fight. We dont have time for is all that petty, thats been going on with these quote, unquote protesters. Reporter all of the unease today coming on the heels of ugly incidents over the weekend in chicago along with nth semitism in cleveland and Police Clashes in kansas city. Trump supporters are under deterred. Politicians that have been elected have forgotten who got us there. Reporter campaign trail hot under the collar. A microcosm of the electorate. Nbc news latest exit polling for the most recent primaries shows trump voters are angry with washington, feel betrayed by the Republican Party and want the next president to be an outsider. Whenever there is a moment in the campaign where hes either falling out of the headlines or the headlines arent quite as favorable to him, hes always able to stir up some kind of controversy to keep his name back in the news. Reporter the Trump Campaign just responded to the Cumberland County sheriffs saying the fayetteville arena was rented by the Campaign Campaign for a private event and that the protesters were just there to agitate. Lester. Katy tur, thank you. Trump is rallying support this evening in ohio on the eve of what is shaping up to be another super tuesday. Winning ohio is key to trumps breakout strategy, but Ohio Governor john kasich also rallying there tonight leads the polls in his home state and is positioned to keep the republican race in play. While the democrats in a battle of their own are nonetheless focused on donald trump. Weve got all sides covered beginning with nbcs peter alexander. Peter . Reporter lester, good evening to you. Ohio governor john case sick still looking for his first win in more than two dozen tries this campaign. His Approval Rating in his home state among Ohio Republicans is close to 80 , but hell need to translate too into a victory tomorrow night to stay alive and to slow Donald Trumps trajectory towards the nomination. Its march madness for republicans. The people that are supporters of donald again. Thats what it is. Reporter on team trump, Chris Christie and sarah palin who is now heading back to alaska. Her husband todd seriously injured in a snow mobile accident. Thank you, guys, for prayers for my husband. Reporter here in battleground Ohio Governor john kasich with 2012 nominee mitt romney. Unlike the other people running he has a real track record. Reporter trump trouncing the competition in florida, marco rubios home state. And in the Buckeye State case sick clinging to a small load and has never lost an election here. Why is it still neck and neck with donald trump here . I dont think its neck and neck. I think were ahead and were going to win. Reporter his challenge to prove hes not just popular, viable. A lot of people dont want to waste their votes and dont want to cast their vote for somebody who cant win. Reporter ted cruz taking a swipe at trumps bluster. If he were, for example, to go out on fest avenue and shoot somebody i would not be willing to support donald trump. An antitrump ad highlighting his disberridging comments about women. Bimbo. Dog. Fat pig. Real quotes from donald trump. Reporter but its all about the delegate count. If trump sweeps florida and ohio, hell extend his commanding lead but if he loses ohio he has to win 60 of the remaining delegates to clinch the republican nomination. Peter alexander, nbc news, westerville, ohio. Reporter im kasie hunt. Democrats unleashing on donald trump today at an msnbc town hall. When you are inciting mob violence which is what trump is doing, people remember mob violence that led to lynchings. This guy is a pathological liar. Its very hard to factcheck him because he never has any facts. Reporter sanders criticism, part of a calculated strategy after the republican frontrunner started namechecking sanders at rally. Bernie, our communist friend. Bernie sanders is the strongest candidate in the general election against drew. I think Hillary Clinton has a number of flaws as a will be able to exemployed. Reporter sanders and clinton on a made dash before tomorrows showdown where the big prize will be ohio. Winning ohio would be huge for the sanders campaign, just like winning michigan was. Provides enthusiasm for his supporters and more importantly money for his campaign to continue. Reporter its also a test to see if clinton can make inroads with young voters. As millennials your voice is important. Reporter snl mocking her attempts to appeal to them by sounding more like sanders. Youre angry and im angry, too, because the top 10 of the top 1 controls 90 of the wealth and the country. Reporter but clinton might have the last laugh if she holds on to her commanding delegate lead. Kasie hunt, nbc news, charlotte, North Carolina. At this hour millions across the south are bracing for more ways of devastating flooding after nearly a week of relentless rain and storm that left six dead and forces thousands to evacuate their homes. Overrun by catastrophic floodwaters, and as nbcs Miguel Almaguer reports, its a frantic race against the clock to save others. Reporter tonight the tonight of deweyville, texas is surrounded by rising water. 1,200 ordered to evacuate here, but some refusing to leave. The only way in or out now by boat or air you think you can help but you cant. Reporter with many homes already swamped, cars submerged and businesses lost, the nearby sabine river could crest tomorrow, promising to swallow whats not under water yet. Ground. Reporter this weekend millions faced tornado and hammering hail in arkansas. In important cuilla lloyd and ruby in their 80s have lost a lifetime of memories. Water got about a foot deep. Lots of mud from the really gross. Reporter their daughter pam says the couple will have to they do not have flood insurance. Reporter in louisiana, 5,000 homes are waterlogged. Federal disaster declared by the president across much of this region. The south has been battered for days. Historic flooding wiped out neighborhoods, roads and damaged bridges. More than 4,200 rescued in this state alone. Tonight they are raising the emergency levees but will they hold . Back in texas, a slow motion disaster. Deweyville is still losing ground. Tonight im standing on what should be a grassy knoll next to a busy street, but as you can see this area is completely swamped. The homes behind me already have significant damage, but if the flooding forecast holds true, the water level here would rise another 4 feet, way above my head. Lester, the damage here has already been historic, but if the flooding forecast holds true, it would be catastrophic. Lester . All right, miguel, thank you. Dozens of people are injured, some critically, after an suddenly flew off the tracks in the dark of night, and there are growing concerns about what may have happened before that crash, something based on something the engineer saw. Nbcs blake mccoy has late details. Reporter investigators on the ground in kansas trying to piece together what caused this terrifying ride. An amtrak train derailing, sending passengers and their belongings flying. Just felt a jolt. We stopped in a big hurry and a lot of big smoke. You could see people falling. Like they were going around like rag dolls, like a nightmare come true. Reporter Antonio Taylor suffered extensive bruising to his back. He was one of 32 people sent to the hospital, two with critical injuries. The train heading from los angeles to chicago derailing just after midnight 20 miles outside of dodge city, kansas. The track is all chewed up. Reporter despite several highprofile derailments from new york city to just last week, u. S. Passenger Train Derailments are actually down in recent years. From 90 in 2006 to 65 last year. Back in kansas ntsb investigators say there may have been a problem with the track causing the engineer to slam the emergency brake. That was probably responsible for the Train Derailment not being any worse than it was. Reporter passengers today thankful to be alive. Blake mccoy, nbc news, chicago. An american who traveled overseas to allegedly fight for isis has been captured in iraq. Kurdish fighters say he was trying to flee isis when he stumbled into kurdishheld territory. It was all news to the mans family back here in the states who say they were shocked when they learned what he had been up to. We get more from nbc news chief Foreign Correspondent richard engel. Reporter this, according to kurdish fighters, is video. Moment after an isis deserter surrendered himself to them, when they asked him where simply united states. Where are you from . United states. Reporter the kurds say they found this virginia drivers license on 26yearold Mohammed Jamal quase. His uncle told nbc news they thought he was on vacation in europe. He crossed the Turkish Border a few months ago and joined isis and when the kurds asked where he had been he answered mosul. Reporter mosul, now an isis stronghold in iraq. Last week, this man who said hes an isis defector, provided nbc news with a cache of documents he claimed he stole from the group. The documents show foreign fighters have to obtain permission to leave with each request carefully logged in these forms. Isis may be starting to lose its grip on its territory. Last week a u. S. Official said isis had retreated from 1,000 square miles. Both the leaking of information and todays bizarre isis may be cracking under the pressure from its many enemies. A u. S. Law enforcement official said quase was apparently not not a u. S. Database of suspected isis members who have traveled overseas. In other words, they didnt know he had gone to fight with isis until he got caught trying to sneak out. Lester . Richard engel, tonight. A surprise announcement today from russian president Vladimir Putin who says hes withdrawing most of Russian Troops from syria charging their mission has been accomplished. Putin sent forces in in october with a stated priority of attacking isis, but u. S. Officials claim that russian air strikes were actually targeting rebels seeking to overthrow syrian leader bashar al assad, a russian ally. There is encouraging news about the youngest survivor from that deadly shooting rampage allegedly carried out by an uber driver in michigan last month. The teens doctors and the family feared they had lost her, but now as our rehema ellis tells us, she is reporter its the first time weve seen 14yearold abigail copf since she was shot in the head hand now smiling with her younger sister at a rehab center. Abigail is amazing, progrezes tremendously every year. Reporter just three weeks ago doctors had pronounced abby dead but her mother didnt give up hope. Youre in there and can hear me, just let me know. Minutes after that i was sitting there, and then all of a sudden her hand just lightly went like that. Im at the kalamazoo Cracker Barrel and theres been gunshots in a car. Reporter today Police Released 911 calls and dashcam video from the night when abby was shot, allegedly by 45yearold jason dalton, then an uber driver. Six people were killed and two injured, including abby. Tiona kruters had shielded children at a playground. This call recorded by a bystander comforting please dont move. Theyre coming, okay . Please dont move. Weve got the kids. Please dont move. Reporter dalton told police he was being controlled by the uber app. Hes undergoing a psychiatric evaluation. On sunday abby whispered to her parents that she loves them. Its overwhelming when you hear your daughter say that when you dont think youre ever going to hear her voice. Reporter her parents say abby is a fighter, still here because shes got a lot left to do. Rehema ellis, nbc news. Still ahead here tonight, women and migraines. The critical time when women may face a growing list of these debilitating headaches and the connection doctors can often miss. Also, over60 million views and counting. The pintsized basketball phenomenon with moves that we asked a group of young people when they thought they should start saving for retirement. Then we asked some older people when they actually did start saving. This gap between when we should start saving and when we actually do is one of the reasons prepared for retirement. Just start as early as you can. Its going to pay off in the future. If we all start saving a little more today, well all be better prepared tomorrow. Prudential. Bring your challenges. I ve been blind since birth. 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Jake reese, day to feel alive jake reese, day to feel alive were back now with new insights into migraines, something american women suffer from each year, three times as many women as men. Now, doctors are learning more about when a lot of women are most at risk and why their symptoms may go undiagnosed. Heres nbcs anne thompson. Reporter laurie is an energetic problemsolver, but in her late 40s this life coach faced a challenge even she couldnt manage. Mike rain headaches, as many as 23 a month. Like basically a claw was gouging out my eyes. Reporter how did you function . I didnt. It was horrible. Didnt have my life. Reporter she is one of a growing number of women reporting more migraines as they age. A new study says the frequency of these headaches increases during early menopause, affecting more than 12 of those women. It has to do with fluctuation of hormones. When they change rapidly, they go up and go down and they go up and go down again this, will trigger more frequent headaches. Reporter often, women and their doctors dont make the connection. Open your eyes. Reporter because women dont realize they are in early menopause with its laundry list of symptoms including hot flashes, irregular periods and anxiety. Is this problem all in a womans head . No, but i think often women are made to feel that way which is probably why they dont like to talk about it. Reporter the doctor says if youre not taken seriously, find a specialist who treats older women and headaches. Make a muscle. Reporter laurie went to five different doctors and tried more than a dozen medications before she found relief. Its wonderful. I have my life back. Other people solve their problems now that hers is under control. Anne thompson, nbc news, washington. Were back in a moment with a special command performance at the white house of the hottest musical on broadway. 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Officer colson was killed and police Just Announced today his death was from friendly fire as officers responded to the firefight. Police also say the suspect intended to die during the shootout, but he and his brothers are now in custody. Way came to the white house today as the first lady welcomed the cast of the broadway smash hit hamilton for a answer questions and just a short time ago a performance of the shows opening number for the first family and a lot of excited fans watching live on the web. For tonight at least the east room, not the oval office was the room where it happened. When we come back, follow the bouncing ball, if you can, the young dribbling dynamo who is amazing tens of millions of people. Im always there for my daughter. For the little things. And the big milestones. And just like im there for her, pacific life is there to help protect me and my family so i can enjoy all lifes moments. Pacific life. 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Rask your rheumatologist t finally tonight, tens of millions have been wowed by her on social media, a viral sensation with a kind of basketball moves that would make and would take many a lifetime to perfect, but incredibly shes only 6 years old, and as our ron mott reports, she can dribble circles around grownups. Mia. Reporter while many kids her age have soft and cuddly bed mates of the stuffed variety, 6yearold jillia dozes off with hoop dreams beside the family boxer tyson. Got to get up. Reporter and puts especially on game time. Pony tail, uniforms and shoes to impress. Shes a dribbling dynamo, handeye coordination seen in someone this young and this close to the ground. Her online videos captivating people the world over, more than 60 million views. Are you shocked by this . Im amazed and shocked and didnt know it would blow up like this. Reporter her father javon is more than just a proud parent. You reddy. Part drill sergeant. Passion the ball over there. Reporter guidance counsellor. Good defense, yall. Reporter swagger, well, thats all hers. How much time do you put in . A lot. Reporter do you skip any days . No days off, baby. Reporter dad and mom tracy first discovered her interest in the sport when she was just one, barely walking and ever since basketball is usually never more than an arms length away. She records the game on dvr and when she lays down to go to sleep she watched the games. Is her favorite player and she recently scored an invite to meet basketball royalty. What do you learn from lebron . What do you like about his game. He does it correctly and he dunks it. Reporter a first grader looks every bit the games next queen on a throne of her own in command of her force. Ron mott. She shoots, she scores. Thats going to do coming up. A new information about the death after Hillsborough County deputy. Plus, trump in tampa. Supporters face off against protesters as the republican frontrunner holds his rally. 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