Right now. Announcer from nbc news World Headquarters in new york, this is nbc nightly news with lester holt. Good evening. Big developments in the race for president , with our poll showing Hillary Clinton and donald trump in a virtual dead heat. A new nbc news wall street journal poll shows clinton leading trump 46 to 43 in a showdown. There are also fresh signs the race will teeter on gender and racial fault lines. The splits are coming into sharper focus at a time clintons prolonged battle to vanquish Bernie Sanders is eroding her position against trump. Nbcs Kristen Welker leads us off tonight. Reporter lester, good evening. Top Campaign Aides tell me Hillary Clintons primary focus right now is donald trump. But shes still battling Bernie Sanders in a vicious primary. And the biggest state up for grabs is right here, california. Hillary clinton ramping up her fight on two fronts, against donald trump and Bernie Sanders. And today, its getting nastier. The last thing we need is a bully in the pulpit. Reporter speaking to Union Workers in detroit, clinton argued trumps policies are bad for working class voters. He could bankrupt america like hes bankrupted his companies. Reporter but trump unleashing a scathing new attack of his own in an instagram video, again slamming former president bill clintons past indiscretions. All this, as our latest nbc news wall street journal poll shows the likely fall fight between trump and clinton is already a dead heat. Clinton leads the presumptive gop nominee by only three points. And a third of sanders supporters saying theyre not backing clinton if shes the nominee. Her numbers middling amidst her battle against Bernie Sanders. Today in california showing no signs of letting up. Sanders is touting a big victory today. The dnc agreeing to give him a major role in shaping the partys platform if he doesnt win. And hes still running hard. Saturday night live having a little fun with all of it. Senator sanders, im sorry, but the night is over. No, no, its not over. Its not over until i say its over. Reporter the joke underscoring a serious problem for clinton. Its going to be impossible for Hillary Clinton to win this election without the votes of Bernie Sanders supporters. Reporter im katy tur in new york. Senator bob corker came to talk foreign policy. And Vice President ial speculation. The highest ranking republican leader visiting donald trump on his home turf. Why would you make this trip here if it was just for a high, hello . I think its certainly worthwhile to sit down and get to know the nominee in a little bit different way. Reporter Campaign Sources tell nbc news the Senate Foreign relations chairman is popular around the fifth avenue headquarters. Especially with the boss. While most hesitated, corker got out in front. I like the speech. I think what youre seeing is someone whos evolving. Reporter in a new nbc news wall street journal poll, 42 of voters nationally say they are very uncomfortable trump would be the first president without a background in government, or the military. Senator corker could certainly try to achieve the balance that trump doesnt currently have. But people dont vote for Vice President ial nominees. Reporter its not all roses. Corker supported Immigration Reform and trashed trumps muslim ban. A subject corker said did not come up today. We talked more about china, russia, the fact that hes challenging some of the status quo, if you will. It is causing these countries to think a little bit about the u. S. Reporter donald trump is back on the campaign trail. Tomorrow, five Public Events scheduled for this week. Including a 25,000 a head fundraiser in california. Lester . Katy tur in midtown manhattan. A Major Development in a case that sparked nationwide headlines and riots in the city of baltimore. It was judgment day for one of the officers charged in the death of freddie gray last year. He was found not guilty on all counts. But as nbcs ron motte reports, five more officers still face trial. Reporter Police Officer edward nero walked out of the courtroom clear of the death of freddie gray. Outside a handful of people were in place to oppose the verdict. He should have gotten something. Somebody got to be responsible for that murder. Reporter the case sparked violent unrest in the city in the spring of last year. Nero was among the officers who detained and arrested the 25yearold gray who was placed unsecured in a police van and suffered a fatal spinal injury. Grays family reached a 6. 4 million settlement with the city. Is there an officer, or officers that the family wants to see convicted based on their role in this case . Absolutely not. This family wants justice. And justice doesnt have the word guilty attached to it, nor does it have the word not guilty attached to it. Reporter officer nero, one of six officers charged, opted for trial by judge, versus a jury. Porters case ended in a mistrial. In announcing todays verdict, evidence showed nero had a limited role in grays arrest and loading into a police van. I think the judge showed the state failed to present evidence of the crime. Reporter the trial for officer Caesar Goodson begins next month. Goodson faces a seconddegree murder charge. Late today, the Baltimore Police Department Said officer nero will remain on the force in an administrative capacity pending the outcome of an internal investigation. That investigation is expected to remain open until all criminal cases have been completed, lester. Ron mottet, thank you. New information about the final moments of a doomed jetliner over the mediterranean last week. Egyptian authorities are now refuting earlier data that seem to show the egyptair jet swerved and made a rapid descent before vanishing from radar. Five days later, however, the answers to this crash are frustratingly still lying somewhere on the bottom of the sea. Nbcs tom costello has the latest developments. Reporter tonight as a multinational effort to find flight 804 continues in the mediterranean sea, egyptian authorities are contradicting Greek Military reports about the planes final moments. Insisting the plane never made erratic turns, or descended dramatically. That it remained on course at 37,000 feet, until going off radar. Meanwhile, u. S. Navy planes have found two debris fields of wreckage, and passenger clothing. The waters are in a big space. Finding small things in the water is extremely difficult. Reporter egypts Civil Aviation minister saying theres no sign of the plane. Were far away from closing in on the fuselage of the aircraft. Reporter five days, still no indication what caused the crash. If it were a bomb, experts would not expect a plane to fly another seven minutes before going off radar. If it were an electrical fire, they would expect the plane to fly even longer. We do not rule out something nefarious, but we just dont know yet. Reporter the last automated computer messages from the plane included overheat and smoke warnings, then flight computer failures. That puts the focus on the forward avionics bay where one of the smoke warnings originated. It sits directly under the cockpit, housing all of the computers that run the plane. Experts say a fire here could take oupt the Flight Control systems or cause the computers to send faulty signals for systems that arent failing. We do not know right now whether there was an explosion, whether there was a structural problem, whether there was a mechanical problem, an electrical problem. Reporter an urgent search for the planes black boxes believed to be amid the wreckage on the seafloor, likely in the deepest part of the med. The search area the size of connecticut. The clock is ticking on finding the black boxes, because the pingers on the black boxes which are right here have only 25 days of battery life before they cut off. The headline at this hour is that the plane may not have made any erratic turns or drops as previously reported by the Greek Military. Lester . Tom costello. Tom, thanks. A landmark moment during president obamas historic trip to vietnam. He announced today the u. S. Is lifting the 50yearlong ban of sale of arms to that country. The latest sign of warming relations with americas onetime enemy. Some lawmakers and activists wanted to see more human rights concessions before the embargo was lifted. This week the governor of louisiana is expected to sign into law a socalled Blue Lives Matter bill. The first of its kind, the bill would make it a hate crime to target officers and other First Responders because of the uniforms they wear. Nbcs Gabe Gutierrez has the details. Reporter it was the deadly ambush of two new york Police Officers in 2014, and then a texas sheriffs deputy last august, that prompted Louisiana State representative lance harris to draft whats become known as the Blue Lives Matter bill. This, i think, it just a rudimentary thing that we ought to do to protect those that are protecting us. Reporter the bill would expand louisianas hate crime statute beyond race and gender to include the targeting of Police Officers, firefighters, and ems personnel. The penalty . Five years in prison, or a maximum fine of 5,000. The state Legislature Passed the bill almost unanimously. Now the governor says hell sign it. But critics argue the bill confuses the purpose of hate crime laws. Law enforcement and ems are not parts of peoples forever identities and should not be included in the hate crimes bill. Reporter the black lives Matter Movement exploded after the Police Shooting of Michael Brown in ferguson. One of the organizers said the louisiana bill dilutes the power of hate crime legislation. If everyone is a protected class, then really no one is a protected class. Reporter overall fatal shootings of Law Enforcement personnel have decreased since the 1970s. But in 2016, there vk at least 20 officers shild in the line of duty, up 43 from this time last year. If your attack is solely based on the Police Officer, you should have an enhanced penalty. Reporter a similar Blue Lives Matter bill has been introduced in congress. Louisianas version is the first of its kind to pass. Supporters hope it wont be the last. Gabe gutierrez, nbc news. Isis has claimed responsibility for a series of deadly bombings along the syrian coast. More than 120 people were killed in the suicide attacks, according to activis activists. Among the targets, two bus stations and a hospital. The blasts are the deadliest attacks yet on two cities considered strongholds to the Syrian Regime since the conflict began. Tonight alarms are being raised after a series of deadly tragedies on mount everest. Four People Killed in four days. And questions about whether the mountain is getting too crowded after climbers have been kept from the summit. Nbcs joe fryer has details. Reporter the highest peak in the world is balancing great feats one moment with tragic loss the next. At least four dead in as many days, including three climbers from altitude sickness. Among them, maria, who taught finance in australia. Its such an incredible tragedy. Reporter dutch climber eric arnold also died. He finally reached the summit on his fourth attempt. But his exhausted body could not handle the trip down. The descent can be just as dangerous as the climb. People become incapacitat incapacitated. At that altitude theres very little anybody can do to help you, unfortunately. Reporter dozens more have become sick and the top of the mountain is now getting crowded. There are problems with, lets say people who are not that experienced, slowing things down. Thats creating some problems for other people. I do love that view. Reporter two americans now close to the summit are sharing their journey on social media. Today on instagram, adrian expressed concerns about stolen oxygen bottles. Climbers taking it too close to the edge. Everest was largely quiet last year after the massive earthquake and a deadly avalanche. Nearly 400 have already reached the top, including charlie, a marine veteran who lost part of his leg in afghanistan, and is now the first combat amputee to get to the summit of mount everest. Joe fryer, nbc news, london. Millions are on alert tonight for severe storms in the plains and southwest. The biggest threat comes from large hail and damaging winds into the evening. Some isolated tornadoes are possible, after 27 reports of tornadoes in the region yesterday. Severe threat continues through thursday for the plains. Still ahead tonight, a new way to detect one of the deadliest forms of cancer. Its cheaper, easier, not invasive and you can do it in the privacy of your own home. One woman says it saved her life. Also, Quarterback Tom Brady throws a hail mary to try and tom brady throws a hail mary to try and reverse his sus i accept im not 22 tom brady throws a hail mary to try and reverse his sus 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. But i wont play anything less than my best. So if theres Something Better than warfarin, im going for it. Eliquis. Eliquis reduced the risk of stroke better than warfarin, plus it had significantly less major bleeding than warfarin. Eliquis had both. Thats what i wanted to hear. Dont stop taking eliquis unless your doctor tells you to, as stopping increases your risk of having a stroke. 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An their dentures and even though their dentures look clean, in reality theyre not. If a denture were to be put under a microscope, we can see all the bacteria that still exists on the denture, and that bacteria multiplies very rapidly. Thats why dentists recommend cleaning with polident everyday. Polidents unique micro clean formula works in just 3 minutes, killing 99. 99 of odor causing bacteria. For a cleaner, fresher, brighter denture every day. This week were taking a look at medical screenings, important tests you need and some you might not. Tonight we look at a new test for colon cancer. The second leading cause of cancer related deaths. Its a cancer that ask be caught early and treated successfully, if you get a colonoscopy. But a third of americans who should get one, dont. Rehema ellis looks into a new test thats easier and less invasive at home and could save your life. Reporter as the sun rises over marlboro, massachusetts, dorothy is grateful to be alive. When she turned 50 last year, she knew doctors recommended having a colonoscopy. But like more than 20 million americans 50 and older, she just didnt. Id heard horrible, horrible things about the prep for the colonoscopy. I just didnt see the cost benefit ratio. Reporter the process includes fasting, laxatives, anesthesia, and the invasive screening procedure itself. Were looking for the polyp. Reporter but one of the worlds top colon Cancer Specialists is prescribing a new option for some patients that can be done at home, not as thorough as a colonoscopy, but better than nothing. The main thing is that the best test is the one that gets done. The home screening kit comes in the mail. Right. Reporter its called cologuard. The first fda approved test of its kind. What do you have to do before you do this test . Nothing. You just have to do your business with this container underneath, and then you just close the lid after you put the buffer in, and youre done. Reporter then you ship the sample to a lap which looks for blood and dna associated with colon cancer. In a study of 10,000 patients, cologuard detected 92 of colon cancers. It costs about 650. And its covered by about a quarter of private insurers. Cologuard basically saved my life. Reporter dorothys doctor convinced her to try it. When the results were positive, she had the traditional colonoscopy to confirm it. After surgery, dorothys cancerfree for now and running strong. Rehema ellis, nbc news, new york. Were back in a moment with the west point cadet who may hey, ready for the big meeting . Yeah. Uh, hello . A meeting . Its a big one. Too bad. We are double booked diarrhea and abdominal pain. Why dont you start without me . Oh. Yeah. If youre living with frequent, unpredictable diarrhea and abdominal pain, you may have Irritable Bowel Syndrome with diarrhea, or ibsd. A condition that can be really frustrating. Talk to your doctor about viberzi, a different way to treat ibsd. 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They started a friendly war making murals out of postit notes. It snowballed into an epic game of one upsmanship that took the media by storm. Reporter theres a street in new york where if you look up, youll be amazed and amused. Whimsical window art on both sides of the street. Theyve got the Rolling Stones and donald trump up there. Reporter in an age of instant communications, these cubicle dwellers have chosen an ancient means to exchange. I think of it as a conversation that were having with the building across the street. Reporter while some have called this a war, its more a friendly rivalry. Competition among advertising and media firms. Yes, thats don draper. Once we see something phenomenal go up, we kind of, among ourselves, talk and say, what can we do next. Reporter the bosses dont seem to mind. They want to see what were going to do next as well. Reporter it took carla allen and her colleague abby smith an hour and a half to post the pink panther. Did you feel almost like one of the drop the mic moments . Totally. And when i went to the street and took a photograph of it, i was blown away by how much better it looked from a distance. Reporter sadly, one buildings landlord said the lease requires the windows be free of everything. Even anything as cool as this. So the art will all come down at the end of the month. On a fun scale 100 . I was elated. I was amped up even when i went home. Reporter prehistoric humans decorated their caves. This doesnt seem all that different. Harry smith, nbc news, new york. Thats going to do it for us on a monday night. Im lester holt. For all 6 us at nbc news, thank you for watching and good night. Good evening, im sheena parvine. Theres a strong thunderstorm moving in and through womenlington and new castle county. Zooming in, newark, and pennsville with heavy rain, lightning in this across the major interstates around 95. It continues mostly to the south and west, and so delaware, youll see this very soon. We have seen indications of hail, about a half inch to an inch in diameter. I think a lot of the hail in this storm is slowly starting to minimize, but if we go through the next hour or so, we still cannot rule this out, so, again, traveling southwest at 30 miles per hour. In middletown, 7 15, and townsend by 7 24. Well continue to track this storm, again, heavy rain, lightning, potential for hail, and also some strong winds. Well continue to track this, and also on nbc10. Com. We return you to regular programming. Madonna and stevies tribute to prince. Plus, the daring, drop dead gorgeous fashions. Just hugs my curves. Then, the lastminute secrets from tonights dancing finale. I think the couple thats going to win is plus, terris at home with new agt judge simon cowell. Can somebody crank up the heat