Clinch the nomination tomorrow, but super tuesday may generate irreversible momentum for Hillary Clinton and donald trump. Theyre favored many most of the 13 state primaries and caucuses. For democrats, its a step toward certainty. For republicans another jolt in the partys identity crisis. Polls show trump leading in at least six states, but he is ng trailing ted cruz in cruzs home state of texas. The republican race, petty, profane and unprecedented, now has prominent republicans talking of an independent candidate if trump wins the nomination. Race became the weapon of choice today and Major Garrett is with the republicans. Reporter following the news that former kkk leader david duke was supporting donald trump, a group of black lives matter protesters interrupted a trump rally in virginia. bleep a Time Magazine photographer tried to leave the press area to shoot the protesters as they were escorted from the venue. Secret service agent. Photographer chris morris later before the confrontation became bleep morris said the agent grabbed him by the neck and put him in a choke hold. Im dealing with some real sleaze bags up here, believe me. I think the press is worse. Theyre worse than the reporter trumps make a sport of criticizing reporters and makes it clear protesters are unwelcome. Get out. Out. Reporter trumps momentum toward the g. O. P. Nomination has brought a sharper edge to his alreadyraucous rallies. Marco rubio complained today the gutter rhetoric makes headlines. What a sad indictment on the state of the political debate in this country today. [applause] reporter but yesterday rubio himself dove into the mud. And you know what they say about men with small hands. You cant trust them. You cant trust them. Reporter rubio is hoping for to stay competitive in the delegate count, while ted cruz is banking on a victory in his home state of texas. And we are, i believe, going to have a big chunk of delegates. And i think everyone else will be way, way, way behind. At that point it will become abundantly clear this is a two man race. Reporter the secret service has interviewed the agent involved at the trump rally. Agency policy is to protect the candidate, not interfere with news gatherings. The photographer involved, chris morris, has said he will not press charges. N pelley especially not after the way he provoked the agent. Major garrett reporting for us. Major, thank you. All of this followed trumps various responses to the support that he is getting, wanted or w not, from the ku klux klan. An today, mitt romney said trump to has been disqualified. Heres Dean Reynolds. Reporter campaigning in virginia today, donald trump was boasting again. We have amazing endorsements, and the people that really mean. We have hundreds of people now that want to endorse. Reporter but praise from david duke, former grand wizard his following more than ever. Reporter last friday trump seemed the say no thanks. I disavow. Okay. Reporter but sunday he declined to renounce the kkk, duke or his support. I dont know anything about david duke. Okay. I dont know anything about what youre even talking about with White Supremacy or white supremacists. So i dont know. Reporter trump eventually tried to clear up any confusion. I disavowed david duke all weekend long on facebook and twitter. Reporter he said a bad earpiece made it hard to hear the question about the kkk on sunday, even though he used the same one for several interviews. In any case its clear some far right groups like what theyre hearing from him. Hes won the backing of the neo nazi web site the daily stormer, for example, and the American National super pac is making calls in super tuesday reporter the southern poverty law center, which tracks hate groups, says that super pac was started by the white supremacist American Freedom party. Mark potok of the s. P. L. C. Said trumps rhetoric is a coded appeal to racists. The idea that any mildly educated person in this country could not know what the ku klux klan was is perhaps one of the most ludicrous statements weve heard in mainstream politics in many years. Reporter the super pac backing marco rubio put hit the way. Trump refuses to denounce the kkk. Think about that. For president . Reporter but donald trump has been heavily criticized before, scott, and so far his support for the nomination among voters in the party of Abraham Lincoln has held firm. Pelley Dean Reynolds reporting for us tonight. Dean, thank you. Well the polls are pointing for a very good super tuesday for and heres nancy cordes. Cor thank you reporter campaigning in virginia and massachusetts, clinton said the republican candidates were behaving like grade schoolers. R remember the little box that used to be on your kids report cards, play well with others . Id have to put a big no. Reporter shes poised to make the deans list tomorrow. The latest cbs news battleground b tracker shows clinton leading ea sanders by 20 points in virginia, 24 points in texas and 28 points in georgia. Other polls have her up in tennessee, alabama and massachusetts. Ma and shes the former first lady of arkansas. That leaves sanders hoping for a strong showing in oklahoma, k colorado, minnesota and his home state of vermont. We can win. No question here in minnesota. N if we have the turnout. Reporter the two have found common cause in their distaste for donald trump. When sanders called trump a retweeted it. But otherwise she has begun to focus less on him and more on her likely race against the republicans. One advantage i have is theyve been after me for 25 e years and im still standing. Reporter the state department is releasing its de final batch of clintons 30,000 emails tonight, but, scott, that does not mean that the saga is over. The f. B. I. Is still looking into her use of a private server and a federal judge wants some of her top aides to testify about it. Pelley nancy cordes with the democrats tonight. Nancy, thank you. Demo well, John Dickerson is our cbs news political director and ur anchor of face the nation. John at the top of the broadcast, we talked about the identity crisis with the republicans. Whats going on with the party . He reporter well, if there is a wall between the Republican Party and donald trump, its now ten feet taller. In conversations today with republican strategists and staffers on the hill, they are at wits end about what it would be like to have donald trump as they pointed out in his interview that he seemed to be trying so carefully not to offend anyone and call anyone a bigot when he was asked about th the kkk and white supremacists. Suddenly, he got politically correct. And what they think, republicans i talk to think, is he was basically trying to not offend any southern voters. So so in super tuesday tomorrow, what house and Senate Leaders are worried about is what is it ik going to look like in the fall y when they and their colleagues have to respond to every w so people i talked to today were coming up with all kinds of mi could take the nomination away at the convention or how they could put a thirdparty candidate if he became the nominee, slip a third party th its hard to tell whether theyre more unsettled about ru being tainted by trump or by the re fact theres not much they can do to stop him from getting the nomination. Pelley John Dickerson. Thank you very much, john. In ohio today, a 14yearold opened fire on classmates in a School Cafeteria north of two students were hit, two others were hurt in the panic that followed. None of the injuries is life threatening. The suspect ran away but was caught nearby. No word yet on a motive. In virginia, the funeral is tomorrow for the Prince William county Police Officer who was o gunned down on her first day on the job. Today the prosecutor said he may seek the death penalty. Heres justice correspondent jeff pegues. Reporter 28yearold Ashley Guindon was a decorated marine corps reservist who was just ju beginning a new career as a Police Officer. But her first day in uniform would be her last. Reporter on saturday night she and two other officers were responding to a domestic e. As the officers approached the front door, they were shot. Ee reporter guindon was rushed pronounced dead a few hours later. The two other officers are o police say 32yearold Ronald Hamilton opened fire on the officers with a rifle. Hamilton, a Staff Sergeant in the u. S. Army, is also accused of killing his wife, crystal hamilton, in the home. The couples 11yearold son managed to run to safety. According to the army, hamilton worked in i. T. At the pentagon n for the joint Staff Support in center. He joined the army in 2002 and served in iraq for two tours. Prosecutors say hamilton had a previous runin with the law but would not release details. Prince William County prosecutor paul ebert. Sad, sad, sad. Its an example of an officers worst nightmare. Grew up in merrimack, new f ir in her 2005 High School Yearbook ok rather than die for nothing. Guindon is the 14th police th o duty so far this year. W un thats a number thats risen same time last year. Pelley jeff pegues. Thank you, jeff. Turning overseas now, isis has been losing ground on the en striking back with a series of bombings in and around baghdad these past two days. More than 100 were killed. Most at this marketplace in a shiite neighborhood. Isis is sunni, the other main faction of islam. The u. S. Ceasefire in syria is holding for the most part, but a hotline set up by the u. S. State department for syrians to call right violations has been ringing off the hook. The civil war has left many of syrias cities in ruin, and Elizabeth Palmer got rare access to homes. A city that once had as many residents as philadelphia but now just a fraction. Or reporter after four years and megatons of explosives, the syrian army finally took back fighters. But several rebel units escaped th into the suburb of al waar, where they tried the make a last stand. T in the end, though, the violence e was too much. Under siege and outgunned, the rebels caved in and agreed to talk. Theyre just out of sight at the end of that road. The syrian army wouldnt allow us in, but they do allow the women out to get medical care and to shop for food. Like, whats changed . Now there are formal negotiations going on with the government, they tell me. Life has improved. The siege has ended and our o electricity and water are back. Supplies are flowing in, too, though every single box is checked by the military. And every canister of gasoline probed for hidden weapons. But now what . In december, six bus loads of rebels and their families struck al al waar to an opposition area further north. That leaves about 1,000 left. Stuck, still trying the hammer out the terms of their defeat. There have been several of these, call them stalemates, call them minitruces, across the country in the last couple years, scott. They dont always go smoothly. Some are more successful than others, but in the end they almost certainly save lives. Pelley Elizabeth Palmer in the syrian capital damascus us tonight. Liz, thank you. Y the label said 100 Parmesan Cheese, but it was 100 wrong. Ut theres a new warning about a ne contraceptive implant used by ra hundreds of thousands of women. And the best of america, awarded the medal of honor when the cbs every day you read headlines about businesses being hacked and intellectual property being stolen. That is cybercrime and it affects each and every one of us. Microsoft created the digital crimes unit to fight cybercrime. We use the microsoft cloud to visualize information so we can track down the criminals. Trust and security are paramount. Were building what we learn back into the cloud to make people and organizations safer. I ve been blind since birth. I go through periods where it s hard to sleep at night, and stay awake during the day. Learn about non24 or visit my24info. Com. This is sheldon starts with minor arthritis pain and a choice. Or take aleve, the 1 recommended pain reliever by orthopedic doctors. Just two aleve can keep pain away all day. Back to the news. Pelley if you love cheese, unappetizing. Some Parmesan Cheese contains wood pulp. An executive at a pennsylvania oo company plead guilty to selling cheese that had no relation to what was on the label. We asked jim axelrod to take a look. Reporter you would think when f. D. A. Investigators found castle cheese marketing 100 Parmesan Cheese that was actually 0 parmesan, the company had a problem. The product that they were marketing and which was on the as label was not what they were selling. Reporter just attorney David Hickton brought the case against the company after an f. D. A. Co inspection in 2012 found the companys parmesan was actually e a mixture of cheaper cheeses like swiss and cheddar, and in one case an unknown ingredient. Advertising it as parmesan and romano and putting something el else so the supplier could make more money. Thats just clearly fraud on the y consumer. Er reporter this was fraudulent in your view . Yes. Reporter but we found fraud these f. D. A. Records show finished cheese was stored in this unfridgerated room, which could cause bacteria to thrive. Whats more, the Company Found listeria, a potentially deadly pathogen, in its production area ten times, but castle continued to produce and sell its cheese to stores like target and wal mart without testing it. That might be troubling enough if we didnt also find records from the Pennsylvania Department of agriculture which inspected castle around the same time as the f. D. A. Those records tell a very different story. Of in june of 2012, state inspector da David Trotter wrote, the plant continues to be in excellent condition. I appreciate the plant management and the quality work they do. His glowing reviews continued until august of 2013 when he 0 left the department of agriculture for a new job. Director of Quality Control at castle cheese. Reporter we asked trotter to or explain his reviews of castle, but he declined. Castle cheese is no longer on the market. The company filed for bankruptcy in 2014. As for the f. D. A. , it will be rolling out new food safety regulations. The f. D. A. Tells us theyre designed to help get state and federal inspectors on the same page. Pelley jim, thank you very much. Well, chris rocked the oscars last night. Rs t put it in like that. S baked on bakedon . It s never gonna work. Dish issues . Trust your dishwasher with cascade platinum. It powers. Stuckon food. Than finish. Hey, need fast heartburn relief . Try cool mint zantac. It releases a cooling sensation in your mouth and throat. Zantac works in as little as 30 minutes. Nexium can take 24 hours. Try cool mint zantac. No pill relieves heartburn faster. Pet moments are beautiful, unless you have allergies. Then your eyes may see it differently. Only flonase is approved toprelieve both itchy, watery eyes pand congestion. No other nasal allergy spray can say that. 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Said its i issuing its strongest warning about essure, an implantable, permanent contraceptive device en used by threequarters of a vi million women. Some have complained of chronic c the f. D. A. Ordered the manufacturer, bayer, to conduct a new safety study. It stopped short of removing the device from the market. And we will be right back. The life behind it. Our nation have earned the very best service in return. Usaa. We know what it means to serve. Get an Auto Insurance quote and see why 92 of our members plan to stay for life. rebecca ive struggled with depression. I thought i needed cigarettes to cope. I was able to quit smoking. And then i started running. Now, i feel a lot better. announcer you can quit. For free help, call 1800quitnow. Good news. Youre down with crestor. Alright now theres a way you can get crestor for 3. Adding crestor, along with diet, crestor is not for people with liver disease, or women who are nursing,pregnant, or may become pregnant. 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Com pand learn how botox , pelley today president obama presented the medal of honor to a 36yearold navy seal from ohio. David martin has his story. Reporter to call edward te byers a combat veteran doesnt come close. I so am i reading here correctly, thats five bronze stars, two purple hearts . Thats correct. Reporter so how many combat tours have you done . Ive done nine combat tours. Reporter in 2012, as a er member of seal team six, he was t sent to rescue an american, dr. Me dilip joseph, who had been kidnapped by the taliban. As they approached the building, the point man saw they had been detected. He saw a guard come out of the door, and he shot him. And we started sprinting toward the door. Ar reporter the point man, nicholas cheque, went in first. But he was shot and later died. I was the second person in. Another enemy standing there with a weapon, and i shot him, and then i saw another person that was moving across the floor. N ho didnt know whether or not that person was the american hostage or if he was an enemy, so i moved down toward him. I was able to get on top of him and pin him down with my legs. Reporter he was adjusting his night vision goggles trying to get a better look at the person beneath him when he heard dr. Joseph call out from another part of the room. He thats when i shot the person i was on top of and jumped off him and on to the doctor who was like three or five feet away. Why did you jump on the doctor . Andy we did that because we au want to protect him from any other potential threats. When i did, that i realized r arms reach of where were laying and so i was able to hold him against the wall by, you d know, grabbing him around the throat and that was. That gave enough time for our teammates to get in there and to take care of that threat. Reporter when you say take care of that threat, how did th they shot him. Reporter you were holding him by the throat against the wall . By correct, yes. Reporter when it was over, five taliban and one navy seal, nicholas cheque, lay dead or dying. Dr. Joseph was shaken but alive. How long did this last . Probably it took a minute to actually go in the room and take m care of everything we just talked about. Reporter thats a lot of o action going on in a very confined space. Thats the nature of this job. Its close quarters combat. Reporter and it takes longer to tell it than it did to happen. Yes, it does. Reporter now there is a medal of honor to go with those five bronze stars and two purple hearts. You have to wonder how many other minutes of close quarters rs combat edward byers saw in his w nine combat tours. One thing for sure, hell never tell. David martin, cbs news, washington. Pelley and thats the cbs le evening news for tonight. Around the world, good night. Captioning sponsored by cbs captioned by Media Access Group at wgbh access. Wgbh. Org breaking news, tops cbs4 news at 6 00 tonight, firefighters are battling the brush fire this afternoon, it caused a major road closure during the rush hour. How dry it is along the front range. Firefighters are still on the scene, near alameda and dayton. Are the crews making progress. Reporter karen, were told that the fire is out and under control. Right now, obviously, wind playing a major factor in how quickly this fire moved and spread across about twoandahalf acre, take a look behind me, you can see crews here on scene, working to mop up the hot spots and really just monitor this fire because the wind continues out here. Crews, however, still monitoring those hot spots, both denver and aurora fire crews responded, two reports of the fastmoving flames and heavy smoke covering alameda, which is what led to the road closure, it took about 1 hour to get the flames under control and grew to 2. 5 acre, no buildings were threatened or damage. One firefighter one denver firefighter was injured, the extent of those injuries is unknown right now. We are working to get more information on his condition in and as soon as we have new updates, well pass that a along to you here and on cbsdenver. Com. Alameda remains closed and its best to avoid this area. Live here tonight, karen morfitt, cbs had news. Boy, that wind is whipping tonight. New details on a deadly motorcycle accident near franktown. Brian and jackie were killed in saturdays crash, and now investigators say the driver who caused the accident was drunk, high, and texting