Reflexes stopping a flying baseball bat from hitting his son. Nightly news begins right now. Announcer from nbc news World Headquarters in new york, this is ennightly news with lester holt. Good evening. A new nbc news wall street journal poll out tonight is showing just how tight the republican nomination is for president. Donald trump leading by just three points nationally. Trump is at 30 , cruz in second at 27, but inside the margin of error with john kasich and marco rubio trailing behind. The poll comes as republicans are voting today in four states, but its next weeks primaries in delegaterich ohio and florida that many expect could blow the gop race wide open. Democrats, mean phil, are squarely focused on todays vote, in michigan. A state key to Bernie Sanders survival. Tonight our poll Shows Hillary clinton leading sanders nationally by nine points. We have it all covered, starting with nbcs katy tur. Reporter gop voters casting ballots in four states for four remaining candidates, but right now its looking more like a twoman contest. Tonight an nbc news wall street journal poll finding donald trump and ted cruz locked in a tight race nationally. With six states under his belt the texas senator showing off his texas swagger. So, of course, donald is upset, and i will predict he will engage in more attacks tax. They will be more personal. They will be more nasty. Reporter tonights battle in michigan and mississippi big indicators, both open primary states where independents or democrats can cast republican ballots. If donald trump has trouble in michigan or mississippi tonight, well see that the establishments attempts to try and slow his progress are working. Reporter now the former nominee mitt romney openly leading an establishment war to stop the outsider today tweeting this attack ad. And the best words, this is [ bleep ]. Reporter romney voicing antitrump robo calls for john kasich and marco rubio in states voting today. Im convinced donald trump would lose to Hillary Clinton. Reporter the new yorker meanwhile trading the trail for tv defending his voter pledge on the today which critics say evokes nazi germany. Im getting by far the biggest crowds and honestly until this phone call i didnt know it was a problem. Reporter a holocaust survivor and former head of the Antidefamation League agreed. Either hes ignorant and doesnt know what it reminds people of which is pretty sad, or hes very savvy, as he says he is, and he knows exactly where hes going and, therefore, its dangerous. Reporter tonight trump hoping to keep his momentum in the face of what could be a changing race. Donald trump needs to win and he needs to win early. If these results come in late that moans its a much closer race than anticipated and that the attacks against him could be working. Lester . All right, katy. Now to the unfolding democrat story. All eyes on the michigan race where Bernie Sanders finds himself at a crucial juncture and as nbcs kasie hunt reports, it could be a makeorbreak night for his campaign. Reporter for Bernie Sanders tonight voting in michigan is a critical showdown. Michigan has the opportunity to move this country forward toward a political revolution. Lets do it thank you reporter todays primary likely his last chance to prove hes a real contender. This is a very significant state for me and for secretary clinton. Reporter sanders is winning smaller states, but so far hes fallen behind in the big diverse states where more delegates are at stake. Hes running out of time. As we get into march 15th theres larger and more important states going. He has to have an unexpected change in wind in order to win these states. Hes close the gan and drawing huge crowds on College Campuses and found strong support in union halls, from working class voters hit hard by the collapse. Auto industry. People are scared. They want to know that the children are going to have a future. Reporter as polls open, sanders was on defense and after Hillary Clinton accused him of voting against the auto bailout. Michigan voters deserve better than typical washington tactics. Please go out and vote today. Reporter Hillary Clinton locking ahead in ohio tonight. Her husband already in illinois and eager to start running in the general election. The sooner i could become your nominee, the more i could begin to turn our attention to the republicans. Reporter sanders today dismissing questions about whether he should step aside. Do you have any real questions . Reporter promising his supporters hell press on. Voters are also going to the polls today in mississippi, a state where clinton is expected to do well, and if thats the case she could actually add to her pledged delegate lead even if she struggles in michigan. Lester . All right, kasie, thank you. Let me turn to chuck todd, nbc news political director and moderator of meet the press. Chuck, focus here. What should we be watching tonight . We want to see was saturday of anything happening in the antitrump movement . Are there antitrump forces coalescing, is it around a truds, a john kasich . Fascinating that our new nbc wall street journal poll, the big winner out of it was john kasich. Can he finish second in a michigan tonight . Can he do well enough that it gives him momentum in ohio . But i think the big story tonight will be whether trump can win by double digits, as he should in both states. He was favored to, or have the antirepublican, antitrump forces closed the gap, and does he struggle in both . On the democratic side, its all about what kasie was just reporting on. Can Bernie Sanders win, if he cant win in michigan, a state tailor made for his issues, antitrade and tough on those things, if he cant win in michigan where is he going to win against Hillary Clinton in a big state . Big test for Bernie Sanders tonight. I think its make or break. All right, chuck, thank you. Tens of millions are on alert in the south tonight for more extreme weather. At least one person has already been killed by a massive storm system in texas. The violent weather leaving a path of destruction in its wake, and the Severe Weather threat is expected to last for days. Nbcs Janet Shamlian has the details. Look at all that stuff flying around. Oh thats a tornado. Reporter the south under siege. 26 million in the path of todays Severe Weather. At least one tornado near fort worth in hood county texas. I looked outside and i seen the roof coming off and then swirling around and before i had a chance to go get under cover gas gone. Reporter jim el hill watched helplessly from his living room. A dozen mobile homes in his neighborhood were torn apart. He pulled people out from under piles of debris. I didnt think i was going to find in there alive. Reporter slow moving storms started in texas but are moving north, carrying moisture from the gulf, setting up potentially dangerous flooding. Tornado and flash flood watches in six states all the way to illinois. In denton, texas, children trapped on a school bus. Rescuers wading through the rising water to pull six of them and their driver to safety. In grapevine an 18wheeler flipped by high winds turned an interstate into a parking lot, and gusts topping 70 miles an hour pulled bricks from the Student Union at Tarrant County college. Severe weather and dangerous conditions continue through ought least tomorrow and could deliver in some areas up to a foot of rain. Janet shamlian, nbc news, houston. Investigators believe a mud slide and a downed tree on the tracks may have caused a passenger train to derail in Northern California. The sheer force causing the lead train car to plunge into a creek below. At least nine people were injured and four of them seriously. The accident occurred after hours of heavy rainfall. Dramatic new video is out tonight showing one. Leaders of the armed oregon occupation in the final moments. State Officials Say their investigation shows police were justified in using deadly force against him, but as our Pete Williams reports the video raises a new mystery over who fired shots at him and when. Cell phone video captures the moment the first shots were fired. Hang on. Reporter oregon investigators release it had today recorded inside the suv driven by Robert Lavoie finecum, the leader of a 40day occupation at an oregon refuge. You want a bloodbath, it will be on your hand. Reporter taken from one of the cell phones it shows him driving barreling towards a police roadblock when state police fire those three shots. Hang on. Reporter after crashing into a snow bank, finicum gets out and repeatedly gets out and says go ahead and shoot me. Damn. Go ahead and shoot me. Stay down, stay down. Stay down. Reporter Oregon Police say officers on the scene had been told that he routinely carried a gun. Police say he twice ignored commands to get on the ground and twice reached for what they thought was his gun. The third time two Oregon State Police officers fired, three shots in all. Damnit, are they shooting him. Reporter did they shoot him . Striking him in the back and killing him. A gun was found in his left jacket pocket. Mr. Finicum was reaching for that loaded. 9 millimeter gun when the troopers lawfully used Deadly Physical force. Reporter still unanswered tonight, investigators say one and possibly two other shots were fired that did not hit anyone. State investigators say fbi agents failed to disclose that they fired them, but the fbi says the agents did not fire. Thats now under investigation, too. Pete williams, nbc news, washington. An american tourist who was killed today in a stabbing rampage in israel, Vanderbilt University says his name is taylor force, a graduate student who was on a school trip. At least ten others were injured in the stabbings near tel aviv before the attacker was shot dead. It happened near an event attended by Vice President joe biden. Biden condemned the attack on social media calling it an act of terror. Two of the jurors who handed erin andrews a 55 million verdict are now speaking out. The Sports Reporter won her civil suit yesterday against her stalker and the hotel where he secretly taped her. As she is jurors tell our Morgan Radford it wasnt really a question if andrews would win but how much she would get. Reporter breaking their silence. She was honest and she was emotional. Reporter for jurors like noble terry and Terry Applegate it was hearing from erin andrews that made the difference. Erin andrews is going to get the money regardless. It was how much and where was the hotel at fault. Reporter what affectled you the most when you were sitting in the jury box . A women who has built her career in a mandominated industry and hats done well and i think outside of this incident her life, her character should be a role model for every young girl growing up, and she said the same. Girls, high school, college, they tweet me and say i want to be erin andrews except for the marriott stalker thing, and i cant control that. Reporter average civil award in tennessee last year was just over 400,000. Andrews won more this week than all. Tennessee awards last year combined, but she may not see much of it. Since her Stalker Michael Barrett was clear that he made the video precisely because he was broke, and if the hotel appeals, andrews wont see any money until that case is complete. Terry applegate says this case wasnt about celebrity, it was about safety. Its important that when we walk into hotels or any public building that says they are going to take care of us, that they take care of us. Reporter Morgan Radford, nbc news, nashville. Now to the urgent warnings over the zika virus in puerto rico. Health officials predict one in five there could become inforecasted. The fda is shipping down blood over fears that local supplies could be contaminated, and tonight the head of the cdc is there calling puerto rico ground zero for the fight against zika in the u. S. Nbcs rehema ellis has more from san juan. Reporter in this hospital Maternity Center in puerto rico, theres growing fear of zika expected to affect hundreds of thousands on the island. Now we have to test everybody and repeat those tests as pregnancy advances. Reporter researchers learning zika can infect an unborn baby at any stage of pregnancy, not just the first trimester as previously suspected. Cdc director on a threeday visit to this popular tourist destination, ramping up the battle to stop zikas spread to the u. S. Mainland. This is the front line . Absolutely. There are going to be more cases in puerto rico than in the rest of the u. S. By many, many multiples, so this is going to be ground zero for the zika outbreak in the u. S. Reporter can you stop it . We dont know how to stop zika. Reporter puerto rico hit especially hard because it has the kind of mosquitos that carries the virus, now becoming resistant to certain insecticides. So far 156 cases have been acquired on the island. Far more worrisome than the 153 brought to the u. S. Mainland by travelers. This woman pregnant with her child cried when she learned she had zika. Her unborn baby girl is developing normally so far. Shes using mosquito spray and hoping for the best. My baby is a blessing and ill have it. No matter what happens ill have this baby. The race to control the virus intensifies on a battleground closer to home. Are a homa ellis, nbc news, san juan, puerto rico. Still ahead tonight, a question that gave us pause when we heard it. Is there a link between carbohydrates and lung cancers . Surprising new research raising questions about the foods so many of us love to eat. Foods so many of us love to eat. Alsodriving record. Both ht perfect. No tickets. No accidents. That is until one of you clips a food truck, ruining your perfect record. Yeah. Now you would think your Insurance Company would cut you some slack, right . No. Your insurance rates go through the roof. 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Some Important Health news tonight about something in the foods a lot of us eat that could be a contributing factor for lung cancer. While the vast majority of lung cancer cases are linked to smoking, researchers say new evidence suggests that diet heavy in certain carbs might also play a role for nonsmokers. Nbcs tom costello explains. Reporter its a leading cause of cancer deaths in the u. S. More than 150,000 people expected to die from lung cancer this year alone. The vast majority current or former smokers, but 15 are nonsmokers. Now Surprising Research has found a potential lung cancer risk factor for them. Certain foods that quickly elevate a persons block sugar levels, high glycemic foods. They tend to be processed, white kind of starchy carbohydrates with a lot of added sugars. They dont tend to have a lot of fibers or nutrients in them reporter m. D. Anderson Cancer Center studied 1,900 lung cancer patients, the Biggest Surprise patients who never smoked were more than two times as likely to develop lung cancer after eating foods in foods high in carbs and sugar, the high glycemic food including bagels and upon corn and process the food like pretzels. The spike can aforecast the way the cells grow, something they have also seen in other cancers. What this does is cause insulin resistance in the south and these lead to the increase in growth factors that are associated with the development of cancer. Reporter doctors say its far too early to conclude white bread leads to cancer, but a lean diet with plenty of fruits, veggies and low glycemic carbs is always a healthier choice. Tom costello, nbc choice. Tom costello, nbc i accept im not 22. Choice. Tom costello, nbc i accept i do a shorter set these days. I even accept i have a higher risk of stroke due to afib, a type of irregular heartbeat, not caused by a heart valve problem. 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The microsoft cloud is helping us to rebuild and reinterpret our business. This cloud helps transform business. This is the microsoft cloud. Finally tonight, the near miss thats making jaws drop across the country. A spring training baseball game where the fastest reflexes werent on the field but rather in the stands when a dad saved his son from almost certain injury. Nbcs joe fryer has the story. For Landon Cunningham who is turning nine next week it was ultimate early Birthday Gift, the trip to the ballpark to catch a spring training matchup where the play of the game would be made by his own dad. He is a hero. 30, rodrigues runs and the bat goes into the seats. You could hear the crowds reaction on the Pirates Radio Network as a bat slipped from the hitters hands hurtling towards the third row when landon was looking down at a phone about to send pictures to his moem mom. I didnt even see it so i was scared. The images captured frame by frame by the Pittsburgh Tribune review, just look at the expressions those around landon and look at the calm reaction of his fathers sean whose instincts set in like a catcher blocking a wild pitch. I didnt have a lot of time to think about it. It just the only thing i can describe it as is dad mode. Reporter granted this, dad played college ball and was drafted by the pros before getting sidelined by a shoulder injury. Now his firefighter, his baseball skills came in handy one more time, saving his son. I kind of said landon, hold her head up and tip your camp he held his hat up and tipped his cap and the whole stadium applauded. And he said dad, this was really awesome. Reporter as for landon. I said is that what usually happens at baseball games. Reporter he got to keep the bat as a souvenir, considered a Birthday Gift he never saw coming. Thank goodness his dad did. Nice save, dad. That will do it for us on a tuesday night. Im lester holt. For all of us at nbc news, thank you for watching and good night. Erin andrews, never before seen tv crime show. The pilot she secretly shot right after her peephole scandal broke. Now, on extra. Erin andrews, crime crusader. Ill help bring a voice to the nameless victims of crime. The tru crime tv pilot she hosted after her own hotel nightmare. Plus, the breakdown on erins courtroom win. How much of the 55 million shell actually see. And reaction to the verdict from the new dancing cast just revealed today. Im glad that justice is coming her way. Padma lakshmis recipe for scandal. Im human. I have made some mistakes. Inside her saucy new tellall from her sexstarsexstarved ma to her whos the daddy mystery. Did kanye hijack Kims Instagram . Her outrageous new tweet today slamming her critics and boasting about cashing an 80 million check. Plus, when marcia met marcia. Sarah paulsens new