Nightly news begins now. This is nightly news with kate snow. Reporting tonight from miami, good evening. With two days until voters here head to the polls the dominant images this weekend distressing. I think a anger boiling their and new signs that the Republican Party is fracturing. He was accused omosphere that condones violence, but trump insisted again he wasnt to blame. Instead, pointing to protesters ator Bernie Sanders for raises the temperature. And the key question now, what impact will the tension havedays vote . Reporter no arrests at the donald trump donald trump rallies. Get them out. Get them out. This after secret service surrounded him hours after a chicago rally was cancelled amid clashes. On wednesday, a trump supporter punched a man. I dont accept responsibility. Efense. I dont condone the violence or what he did. You know what . Not nice on the other side its possible you could help him with legal fees if this man needs it . I instructed look to it, yes. Reporter a man was kicked out today, saying he thinks that trump is inciting the i get passionate about the whole racism and hate that is being shown at these orter marco rubio saying hes very concerned someone could lose their life at a trump hes in florida. Home state. Grasping for votes as the new t journal marist poll has him behind trump. Hes turned the mostant election into a circus, a carnival. Reporter john kasich faring better in ohio but even if he wins his home state, he cant secure the nomination without a. I think when people around the world see images of each other at the Campaign Rally theyre like, were in disarray. Thats what theyll try to say. It will bea tool. Reporter and ted cruz is looking for against trump. Responsibility starts at the top. It is not beneficial when you ndidate like donald trump telling the supporters, punch that guy in the face. Reporter tonight the frontrunner is refusing to pull nomination. Trump is set to speak in boca raton, florida, later tonight. To give you an idea of how confident just scrapped a planned event in florida tomorrow, choosing to visit ohio instead. Kate . Gabeang tierrez, thank you. Trump is casting blame on the democrats specifically Bernie Sanders who in response has flatout called trump a liar. Meanwhile,tons latest attack has backfired a bit. We get more on all of that from nbcs kristen welker. Reporter donald trump the arrest of violent protesters at his rally. Now saying democrats are orchestrating them. Laying blame directly at senator Bernie Sanders. Had Bernie Sanders signs all over the place. They were made by Bernie Sanders people. Reporter sanders dismissing trumps claim. We have never the truth is, this guy really is a path logical ter trump threatening retaliation, tweeting Bernie Sanders is lying when he says his disrupters arent told to go be careful, bernie, or my supporters will go to yours. While some denied getting violent. Its the other way around. Ting Death Threats since the trump rally. It came with the territory. These are the type of people that i support that are supporting donald reporter this comes as the democrats are locked in a tight our latest poll shows clinton with commanding double digitin florida and ohio, but topping him only by six points in his home state. She accused sanders of being absent during the health care i dont know where he was when i was trying to get health care in 93, 94. Reporter prompting a sanders 1993, showing sanders standinghen first lady during one of her health care speeches. Im grateful that congressman sanders would join us today. Linton team insisting the video proves their point, that clinton was leading the fight. But sanders isnt backing riticize me on health care is not quite fair because i have been a leader in congress from day one. In the fight foral health care. Reporter the heated back and forth underscoring the high stakes on tuesday if sanders wins big in the midwest like here momentum and more money and could go all the way to the convention. Kristen welker, thank you. As we have mentioned here in florida, donald trump is leading our latest nbc news wall street journal marist poll by more than 20 points over home state marco rubio. Trump supporters call themselves while it may not be as conventional as other so called ground calls, trump has an army of volunteers in the state. We met one crew in hollywood, florida. Linda . How long have you been sitting out here . I have been out here since last saturday every day, 8 30 to 6 00. Reporter what do you hear from people, do they avoid you . No, voters are going into the polling, theyre giving me a thumbs up. Trump is the man. We need him to make america great. We need to change our country for the better. Theyre going in to vote for trump. Reporter you saw the video friday night in chicago. Yes, i did. Reporter people think that Trump Supporters are angry. Some of the own republican competitors are saying hes instigating. Getting people riled up. Are americans angry, yes, im angry, im angry at my current system. Failed the american people. Donald trump has brought that to the forefront. Get them out of here. Reporter so he says things like i want to punch that guy in the face you feel what . I would say the same thing. Thats a human reaction. Im sure if i were to have a conversation with donald j. Trump i would say how do we deal with these thugs and thats all they are. Thugs. Reporter are you meeting new voters . Im meeting new voters all the time. In fact, we met a cuban man who voted for first time. Did you vote for donald trump . He said absolutely. Reporter you dont see large call centers for trump, but people are being trained to make phone calls right out of their open home. Are you planning to vote for mr. Trump in the republican primary . Have you made for donald trump . 10,352. Have you been calling all day long . Sometimes for 11 or 12 hours. Why are you so passion natural about donald trump . Hes a brilliant business man. He loves the country. He is the epitome of the american dream. Hes totally hes taking a break from building his empire to rebuild the american empire. Reporter rachel said shes an entrepreneur who works from when own home. Considers trump a mentor. Now to the devastation in the south where millions remain under threat of flash floods across four states. The death toll has now risen to six from the record breaking storms and tonight the region is tornados. Dalla. Reporter relentless rain its incredible. Reporter and tonight the threat of more rain on already saturated grounds. Its been pretty bad. Hopefully wont get worse. But it doesnt look good. Reporter 2 Million People in parts of four states are under flash flood warnings and watches. Families fleeing as the sabine river overflows. Right now were in the sabine river. People are evacuating. Reporter texas is cut off, the only way out is by helicopter or boat. Tractors, cars, trucks. Buildings. Everything under the barn is gone. Reporter 4,400 homes darned in louisiana. More than 800 in louisiana. When you saw the water had come back up given, what went through your mind . Oh, no, not again. Reporter Linda Parrish escaped by boat. Returning to a basement filled with water. Well survive, you know . And everything. Reporter the city spared from the path of the storm. But the officials warn the floodwaters could be toxic. If you look at all the trash and floating through the house, the house, you know, theres gasoline, thats in the peoples houses. Reporter officials are urging residents to continue to wait for the floodwaters to drop. Before returning home. This after a sixth weather related death. A man who drowned while trying to retrieve personal belongs from his house. Kate, back to you. Thank you so much. Turning overseas where a car bomb has killed more than two dozen people in the turkish capital of ankara. Chief Foreign CorrespondentRichard Engel has more from istanbul. Richard . Reporter good evening, kate. By all accounts this was a in the center of ankara at a transportation hub. A place that there are multiple bus stops, several entrances to the subway. Most of the People Killed and the dozens and the death toll has been updated. We are waiting to get on one of the buses, Walking Around in this area. No claim of responsibility, but the u. S. Embassy did warn americans that there could be a terrorist attack a few blocks from where this explosion took place today. Its unclear if that warning in the u. S. Embassy was connected to the attack. Theres been a lot of bombings in ankara and also a shooting not very long again in istanbul. With the terrorist attacks people when they hear theres been another one are not are not surprised and shocked that it happened. But asking themselves well, who was responsible this time . The kurdish militants who have been fighting against the government primarily in southern and eastern turkey. Or isis which has been using turkey as its main transit point into syria for the last several years. So far the turkish government hasnt made any specific accusations. Kate . Richard engel, thank you. In Ivory Coast Armed men attacked a beach resort killing at least 14 civilians, two soldiers according to the president. The gunman targ targeted beachgoers and at least six attackers were also killed. The north African Branch of al qaeda has claimed responsibility. Days before the anniversary of the germaniman wings crash that killed all 150 people on board a commercial jet investigators have released their final report now. It claims the copilot who intentionally crashed the plane had raised red flags about his Mental Health. Now as nbcs Kelly Cobiella reports theres a push to change patient confidentiality rules if it means keeping passengers safe. Reporter just two weeks before flying into the french alps killing everyone on board, french investigators say copilot Andreas Lubitz was diagnosed with possible psychosis and referred to a psychiatric hospital. On the day of the crash, lubitz was on two antidepressants and sleeping pills. His employer was never told. Nearly a year after the crash, the final report confirmed lubitz purposely brought the plane down. 30 minutes into the delight flight, the pilot leaves to use the bathroom, and he is locked out, changing the altitude to 100 feet and increasing the speed. The captain pounds on the door. Then, sounds of five violent blows to the cockpit door. 41 minutes after takeoff, the jet crashes into the side of the mountain at 400 miles an hour. The parents of passenger Robert Oliver calvo hoped it would explain how a suicidal pilot was allowed to fly. Almost everybody completely unsatisfied with the answers that were given. Reporter investigators said lubitz hid his condition from employers and doctors didnt talk about it citing patient confidentiality. Theres a requirement now to doctors to speak out if a Mental Health of the pilot threatens Public Safety and requiring pilots to have more Mental Health checks. Tonight, germanwings Parent Company lufthansa will support the recommendations and the Airline Denies wrongdoing. Take years. Kelly cobiella, london. Massive gas leak drove them residents in los angeles were hoping life would get back to normal when they were leak in their neighborhood had been hundreds are reporting new health concerns. Reporter Melissa Seymour says the rashes wont go away. Horrible red all over, itchy, burning. Reporter she said is breaking out all over her body. Her mother, jackie, herself experiencing headaches. We have gone to the doctors, allergists. Everybody cant determine what this is. Reporter one letter says move now thats a rheumatologist, telling you to leave. Absolutely. Telling us to leave. Reporter melissa but she said her rashes began when a ruptured well spewed methane gas into the atmosphere. The Los Angeles CountyHealth Department immediately started to headaches nausea and rashes. Please do something. Reporter the well sealed last month. Thousands returning home told it was safe, but now the Health Department is reporting 300 new Health Complaints in the last several weeks. Despite capping the well, matt paduco says his own home still makes him sick. One of the sickest days was the night after it was capped and i spent a night here. Reporter next week well owners Southern California gas will test a small number of homes to see if the me tape that methane lingers. We want to do the tests to ease the concerns and fears of the residents. Reporter little comfort for melissa, concerned the marks on her skin are signs of something worse. I worry about what happens in the next ten years or what happens when i have kids. Is this something they have to deal with . Reporter worry that will linger until answers. An incredibly rare sight, a drone captured this humpback whale doing what looks like a head stand. Scientists arent sure why they do this. Some superheroes needed rescues themselves in new hampshire. A viral photo shows captain america and wonder woman dressed on the way to the party when their car broke down. A reallife superhero, a state trooper gave them a lift. Finally tonight, we escaped to an amazing world of adventure where our minds can go even when our bodies cant. Some of the hottest technologies, transporting kids to some places theyd never see otherwise and that includes time travel. Our Kristen Dahlgren shows us how it works. Come on, honey. Reporter for a little guy like brody scott, being in a hospital is tough. But in an instant, all that changes. Hospital walls, virtually disappear. And breaux ody is flying free on a roller how fast were you going . And david rivers transforms and he never leaves his bed. You think is about having fun. Reporter its thanks to virtual reality. Every week volunteers from tech company game start bring Vr Technology to the Childrens Hospital at the university of michigan. Even kids who are in a wheelchair, kids who cant move any part of their body can ride a horse or can fly an airplane or just walk. Reporter put on a headset and the pain seems to disappear. Even for the sickest of patients. Gerald clooney is battling cancer but today he gets to be just a regular kid. Upside down. What . Its a little moment in time where theyre just in just a blink our kids got to be normal. Reporter kids once confined to beds now ease year to swallow. The hope is that all this type of joy to patients who often about. Without that technology, without the people that help bring this stuff to this hospital, how pass away without knowing the experience and the thrill of the roller coaster ride . Reporter thrills for those who need the most. Oh, my. Reporter and for a little while at least reality seems a whole lot brighter. Kristen dahlgren, nbc news, ann arbor, michigan. Thats good stuff. Its monday, march 14th. Coming up on early today, vitriol and violence filled many donald trump rallies over the weekend but will tuesdays big vote accident the frontrunner . Dangerous tornado in multiple states and deadly floods inundate thousands caught as waters continue to rise. A Police Cruiser is stolen leading cops in a highspeed chase of one of their own heavily armed cars. Plus let the bracketology begin at the ncaa tournament is set. Where in the world has Richard Simmons been. And saturday night live lights up the weekend with the return of larry david. Early today starts right now