What hes claiming he did. Nightly news begins right now. From nbc news World Headquarters in new york this is nbc nightly news with lester holt. Good evening there is a virtual civil war being waged tonight. An inner party fracture of a magnitude virtually unheard of in modern american politics. In a shocker late today the most powerful republican in congress, House Speaker paul ryan, said flatly, hes not ready to support donald trump. Joining some other prominent names, including two former president s who say theyll stay on the sidelines. The republican partys presumptive nominee finding himself having to win over key members of his own party. But his response to ryan just a short time ago may not get him there. Nbcs katy tur has todays stunning developments. Reporter donald trump 345i be headed to cleveland to accept the republican partys nomination, but the leader of the party, paul ryan, says he cannot support or endorse yet. Im not there right now. And i hope to, though, and i want to. But i think what is required is that we unify this party. Reporter the speaker of the house saying trump needs to live up to the gop legacy. We hope that our nominee, as far as lincoln and reaganesque. It really calls into question the future of the party. Whether or not the gop past november will be able to be a viable, National Party that can elect president s. Reporter just today ryans former running mate mitt romney announced he would not go to the gop convention. Joining both president george h. W. Bush and george w. Bush who said they will not endorse. Today john mccain tepidly said hed support the partys nominee but privately worried to fundraisers about his own reelection bid in arizona. If donald trump is at the top of the ticket, no doubt that this may be the race of my life. Reporter trump is still drawing record crowds. Today thousands waiting in the rain in west virginia. A state filled with white workingclass voters. To win in november, trump will need to capitalize on that demographic, making rust dealt states obama won in 2012 like ohio, pennsylvania, wisconsin, and michigan, turn red again. While mitigating a potential loss in arizona. A republican stronghold. And home to a large latino population, turned off by his antiimmigration rhetoric. Trump tweeting today, i love hispanics. With a photo of himself eating a taco bowl on cinco de mayo. Hillary clinton immediately firing back with video in english, and spanish, targeting trumps deportation plan. Have to go. Late tonight donald trump responded to paul ryan saying he doesnt endorse speaker ryans agenda. Meanwhile trump is about to take the stage here in west virginia, and as you can see, this room is packed, lester. Its just another sign of how disconnected the gop leadership is from its base. Katy tur. Thank you. Tonight a monster inferno raging through the canadian province of alberta has exploded to a size bigger than new york city. A crisis spiraling further out of control consuming at least 1600 structures, including entire blocks of homes. Firefighters working around the clock, but the question tonight, are there enough forces on the ground . Our National CorrespondentMiguel Almaguer takes us beyond the fire lines. Reporter the fire here is raging. Now ten times larger than yesterday. Tonight, Fort Mcmurray is up in flames. This, our firsthand look at the firefight. A battle crews are often losing. Entire neighborhoods are decimated. Oh, my god reporter and overnight, more heartpounding evacuations. Now nearly 100,000 have fled their homes. With cars abandoned along highways, thousands are sleeping in cots. Nowhere to go. All you see is red flames. Its pretty scary. Reporter in the town of anzak, women, children, the elderly, evacuated for a second time, bused five hours away. It just sucks going from one vehicle to another, town to another, who knows if it even goes further. Reporter the flames are still racing through neighborhoods today. 49 wild fires burning in alberta. Many of them out of control. Because this fire moved so quickly, crews have not yet been able to tally the damage. Tonight, theyre still trying to fight the blaze. With at least 1600 structures destroyed, and counting, tonight there are 350 firefighters on the ground. In a similar size fire in california, there are typically thousands. But firefighters say each blaze is unique, and the focus in Fort Mcmurray is saving lives. No one is hurt, and no one is passed away right now. I really hope that we get to the end of this and we can still say that. Reporter tonight the fight continues, a tough battle waged on the front lines where theyre still losing ground every day. Miguel almaguer, nbc news, Fort Mcmurray, canada. Tonight hazmat teams in houston are trying to clean up Hazardous Material from a massive fouralarm fire that erupted at a chemical warehouse. Explosions and toxic smoke billowed into the sky forcing hundreds to evacuate or shelter in place. Nbcs Janet Shamlian is there with more. Reporter explosions. Amid a massive fire, rocking houston today. Like a bomb. Reporter starting in a home the blaze quickly engulfed a neighboring industrial building. Inside, ammunition, and drums of chemicals that blew up like fireworks. The explosion, that was big. You could feel it. It shook the ground a little bit. Reporter with billowing smoke spewing Hazardous Material into the air, authorities sent out an urgent shelter in place order. People urged to close windows and stay inside. We dont really know the product of combustion at this time. What we do know is that it appeared to be petroleum based, and pesticides can be also included. Reporter more than 600 students evacuated from a nearby elementary school. The fire went to four alarms, with almost 200 firefighters on the front lines. Fighting the flames amid high winds, and flying debris. That thing flew over and thats when a big ball of fire erupted and we just felt the heat. Reporter the still smoldering aftermath looking like a battle zone. Firefighters say its a miracle no one was hurt. Houston firefighters and hazmat teams are still here working the scene tonight. Theyve identified the chemicals and pesticides and Petroleum Additives that have now flowed into a nearby creek. At this hour their focus is on cleaning that waterway. Janet, thank you. For the First Time Ever the feds will regulate the 3. 5 billion dollar industry ekrig set industry. The fda announcing new rules about who can buy them and how theyre sold. All of this to snuff out what the government sees as an alarming increase among the youngest users. We get more from nbcs anne thompson. You like that one . Reporter todays action is aimed at extinguishing ecigarettes growing popularity among teenagers. Kids producing puffs of vapor instead of using traditional Tobacco Products like 17yearold ryan. I used to chew tobacco and i use it as an alternative to that. I think its a lot safer. Reporter the government says 3 million middle and High School Students use ecigarettes last year. Among high school kids, an eyepopping 900 increase in four years. We need to bring these products out of the wild, wild west and into the world of regulation so that we can protect the public with sensible, reasonable, regulation. Reporter under the new rules, ecigarettes cannot be sold to anyone under 18. They wont be in most vending machines, and free samples are prohibited. The products and ads must have warnings. The state the product contains nicotine and that nicotine is addictive. The sellers and makers of ecigarettes claim that it is a safer alternative to cigarettes. But under the new rules, theyll have to prove that to the fda, as well as get the fdas okay for their products. The industry is fuming. What i see this regulation as doing is decimating a industry and driving consumers back to smoking. Reporter the government says the rules will also make the devices and batteries safer. Ryans battery operated ecigarette exploded in his face. I was really, really scared because its a traumatic experience. Reporter the industry plans to kick off a campaign to promote safer usage in the next month. A move too late to avoid regulation. Anne thompson, nbc news, new york. Now to the verdict late today for one of the most infamous serial killers in recent times. The socalled grim sleeper. Found guilty in the murders of nine women and a teenage girl over the course of two decades in the South Los Angeles area. And as nbcs Steve Patterson tells us, he was caught by a piece of pizza. Guilty of the crime of first degree murder reporter after eight hours of deliberation, a verdict. 63yearold Lonnie Franklin jr. Found guilty of ten counts of murder and one of attempted murder. For families of the victims, closure. What goes around, it came around. And now his turn. Reporter nicknamed the grim sleeper because of a 14year gap in his killing spree, prosecutors say franklin murdered nine women, and one teenage girl between 1985 and 2007. Police used a dna sample from franklins son in an unrelated criminal case, which closely resembled dna they found at the grim sleeper crime scenes. Dna found on a slice of discarded pizza connected franklin to the crimes, and led to his arrest in 2010. Authorities believe there could be other victims, because hundreds of photos were found in his home. The threemonth trial included more than 400 pieces of evidence, and 80 witnesses, including the sole survivor of the attack, who told jurors franklin raped and then shot her. During her testimony, she pointed at franklin and said, if i die, im going to haunt you. In closing arguments, the defense questioned the dna evidence. This is a circumstantial evidence case. Reporter but prosecutors said the evidence was overwhelming. You have dna, firearms evidence, the murder weapon. What more is there . Reporter next week, jurors decide if Lonnie Franklin jr. Should be put to death. Steve patterson, nbc news, los angeles. Now to a major warning that might send you rushing to change your email password which may not be a bad idea when you hear this. Cybersecurity experts recently uncovered a massive trove of stolen usernames and passwords, hundreds of millions of them. And as nbcs tom costello tells us, it involves some of the biggest email providers in the world. Reporter they were being offered for sale on the socalled dark web, where hackers hawk their goods. 272 million stolen email accounts, among them yahoo gmail and microsoft addresses including passwords. Offered for sale by a russian hacker, and discovered by a milwaukee Security Consultant alex holden. We know that hes a young man in central russia who collected this information from multiple sources. Reporter hackers use stolen email information to lure users into giving away more information. Including dobs, Social Security numbers, and bank account details. All the more reason, say experts, to change passwords regularly, even monthly. Dont reuse a password. Dont use the same password for your bank as you do your Retail Shopping as you do your email. Reporter what makes a good password . They do not include names of children, pets or home addresses that could be found online. Instead abstract combinations of letters, numbers, and characters that a hackers Computer Program would never guess. Perhaps mixing languages. Even running together the lyrics of a song. Experts also advice paying for credit monitoring to watch for dus pishs activity and be very skeptical of all incoming emails that could be phishing for more personal information. A moment of distraction and a click on a bad link can invite cyber crooks a world away. Tom costello, nbc news, washington. Still ahead tonight and on the topic of securing your computers, explosive new claims from the hacker who exposed Hillary Clintons use of private emails to the world. Not only did he discover her server. He tells nbc news he broke in to it. In his firstever american tv interview. Also caught on camera, powerful turbulence rocking a plane full of people, 73 of americans try. To cook healthy meals. Yet up to 90 fall short in getting key nutrients from food alone. Lets do more. Add one a day mens 50 . Complete with key nutrients we may need. Plus it helps support healthy Blood Pressure with vitamin d and magnesium. Your body was made for Better Things than rheumatoid arthritis. Before you and your rheumatologist move to another treatment, ask if xeljanz is right for you. Xeljanz is a small pill for adults with moderate to severe ra for whom methotrexate did not work well. Xeljanz can reduce joint pain and swelling in as little as two weeks, and help stop further joint damage. Xeljanz can lower your ability to fight infections, including tuberculosis. Serious, sometimes fatal infections, lymphoma and other cancers have happened. Dont start xeljanz if you have an infection. Tears in the stomach or intestines, low blood cell counts and higher liver tests and cholesterol levels have happened. Your doctor should perform blood tests before you start and while taking xeljanz, and monitor certain liver tests. Tell your doctor if you were in a region where fungal infections are common, and if you have had tb, hepatitis b or c, or are prone to infections. Xeljanz can reduce the symptoms of ra, even without methotrexate, and is now available in a oncedaily pill. Ask about xeljanz xr. Nbc news has confirmed that the fbi has interviewed several of Hillary Clintons top aides in the investigation into her private email account, including her close confidant huma abedin. And tonight, in his First American television interview, the romanian hacker who was the first to reveal that clinton was using a private email address while she was secretary of state, makes alarming new charges. Senior investigative correspondent Cynthia Mcfadden went to a romanian prison to interview him. When Hillary Clinton says that her server is absolutely safe, youre laughing. Translator thats a lie. Thats a lie . Yes . Yes. Its not safe . Its not safe at all. His name is marcel hasar. Better known as guccifer. Since we talked to him hes been extra dated to the u. S. To face a variety of hacking crimes against american political figures, including clinton confidant sidney blumenthal. You hacked your way in to the bush family emails. You hacked your way in to Colin Powells emails. Youve uncovered that Hillary Clinton was using a private email much more. And many more. Yes. He says he got in to clintons private server itself. Translator by running a scan i found that server was completely unsecured. I want to make sure im understanding what youre saying. Youre saying the clinton server was unprote unprotected . Translator yes. And you had total access to it had you wanted to download translator yes, it was like an open orchid on the internet as many such servers are. Just this week Hillary Clinton told Andrea Mitchell on msnbc the private server which she used as secretary of state was safe. Any indication that your private server was hacked by foreign hackers . No. Not at all. Clinton Campaign Spokesman brian fallon slams these new allegations. There is absolutely no basis to believe the claims made by this criminal froms prison cell. In addition to the fact he offers no proof to support his claim, his descriptions of secretary clintons server are inaccurate. It is unfathomable that woe have gained access to her emails and not leaked them the way he did to his other vick testimonies. We asked several cybersecurity experts to review how lazar claims to have gotten into clintons server. All concluded it was possible. Among them, former fbi cyber crime expert Chris Tarbell who led the successful prosecution of the criminals behind the online black market called silk road. He cautions that hackers like guccifer are notorious liars but still he says he takes these allegations seriously. Its plausible. Because he did get access to emails that allegedly came from that server. Each email has a header and that tells you the information and the path of where that email came from. And if hes lying . That seems silly to me. To go on television and admit to a tellny you didnt commit seems a little silly. A source with knowledge of the investigation tells nbc the fbi review of the clinton server logs did, in fact, show no evidence of hacking. But tarbell says server logs are not necessarily comprehensive. So, it may be that there is no breach that was recorded . That doesnt mean there was no breach. Correct. A source close to the investigation tells us the fbi escorted him to the u. S. And spoke to him in transit. Though tonight, several officials emphasize investigators have seen nothing yet that substantiates his claim. The investigation continues. All right. Cynthia, thanks very much. You can hear much more from him on the premiere of our special series on assignment sunday night here on nbc. Were back in a moment with a shocking moment caught on tape. Dangerous sparks flying in one of the dangerous sparks flying in one of the biggest subway and im still struggling with my diabetes. I do my best to manage. But its hard to keep up with it. Your body and your diabetes change over time. Your treatment plan may too. Know your options. Oncedaily toujeo® is a longacting insulin from the makers of lantus®. 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It kills fleas, ticks and mosquitoes. K9 advantix ii. For the love of dog. A wild and disturbing scene caught on camera on a flight to indonesia. 31 people injured by severe turbulence. Passengers heard screaming aboard the Etihad Airways jet about 45 minutes from arrival. Nine passengers were hospitalized, while others were treated at the scene upon landing. In this country, more problems today for the d. C. Metro system. Service shut down on three lines, and then this. A fireball caught on camera. The result of an arcing insulator that filled the tunnel with smoke. The latest in a series of disturbing mishaps. A spectacular show will light up the sky tonight at the peak of a meteor shower created by halles comet. The meteors will be coming in fast about 150,000 miles per hour. But they can be seen by the naked eye. Sky gazers in the southernmost parts of the u. S. Are in the best position to catch a glimpse of the show. When we come back, how Johnny Carson saved a classic american game, now celebrating 50 years of bringing fun to every Auto Insurance policy has a number. But not every Insurance Company understands the life behind it. Those who have served 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. Or if youre young or old. E if you run everyday, no matter who you are a heart attack can happen without warning. If youve had a heart attack, a bayer aspirin regimen can help prevent another one. Be sure to talk to your doctor before you begin an aspirin regimen. Bayer aspirin. If you have postmenopausal osteoporosis and a high risk for fracture. I can tell you prolia® is proven to help protect bones from fracture. But the real proof . My doctor said prolia® helped my bones get stronger. 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My tip is, its hard to serve your country when youre too weak to put on your uniform. announcer you can quit. For free help, call 1800quitnow. Flea bites can mean misery for your cat. Advantage® ii monthly topical kills fleas through contact. Fleas do not have to bite your cat to die. Advantage® ii. Fight the misery of biting fleas. Finally tonight an iconic game thats given americans so many hours of entertainment is turning 50. When it was created in 1966 it was call the pretzel. We know it a lot better today as twister. But as nbcs Morgan Radford explains, it might not be so popular all these years later if it werent for a certain late night host. Reporter the game that asks you to put right hand on red, now marking its 50th birthday. But it hasnt always been such a hit. When it came out in 1966, sales were poor. Red. Left. Yellow. Reporter Department Stores even thought the game was too risque because of all the bodily contact. But then the tonight show starring johnny cars carson. Reporter Johnny Carson and ava gabor played on the tonight show. Suddenly the game selling millions of copies the next year. And decade. Twister reporter spinning its way to success. And becoming a cornerstone of pop culture. Right hand blue. Reporter last year Country Store thomas rhett broke the record for the Worlds Largest twister game, unrolling a 27,000 foot matt in arlington, texas. Today twister is sold in over 35 countries. Cashing in on the fun, and the nostalgia. Im very happy that people are still enjoying it. And still having fun. Playing the game. 50 years the game hasnt changed but fans are still willing to tie themselves up in knots. Back in my day we didnt have cell phone, it was just good old family fun time. I am 42. Ive been playing since i was little. Left foot on green. Reporter the game that ties you up in knots, still tying people together. Morgan radford, nbc news, los angeles. That will do it for us on a thursday night. Im lester holt. For all of us James Cordens car pool karaoke with gwen, george, and julia. Now on extra from new york city. Rocking and rolling with gwen. Picking up a few celebrity surprises. James cordens new triple alist car pool karaoke. Its been an incredible year. Could lettermans old job be in the cards for corden . Breaking news on a late night shake up behind the scenes. On the new talking trump. The queens, kings, and the joker. And the open mike oops. Kim kardashians body guard breaks his silence. The real story behind his reported firing by a fuming kanye. Then my interview with alec baldwin taking on reports. Is that something you would consider . And is leo dating this burnett beauty . The hot new summer trend you can wear to the beach and the office. And whyll