Bridge a glaring deficit among women . Nightly news begins right now. The Republican National convention. This is nbc nightly news with lester holt reporting tonight from cleveland. Good evening. On Donald Trumps big night, his chance to sell his vision to america when he stands from the podium just across from us to deliver a primetime address later this evening. It will also be a chance for republicans to finish this convention on a high note after a week in which controversies have overshadowed the planned message including the one theyre still buzzing over in this hall this evening. The stunning moment that saw former trump rival senator ted cruz literally booed off the stage after he sidestepped a chance to endorse trump. Today cruz is explaining himself as the trump e from cleveland. Lets start with nbcs hallie jackson. Reporter in a packed hotel ballroom, new fallout from ted cruzs refusal to endorse donald trump. Are you going to vote for trump . Reporter some texas delegates defending their home state senator. Others supportive of trump pushing cruz. What hes doing is creating that Division Just because hes mad at trump because of those personal attacks. Hed rather kill the party and divide our votes because of his personal anger because trump said bad things about his family. Reporter trumps primary attacks against cruzs wife and father, falsely implying he was involved in jfks assassination, clearly still raw for cruz who in the primaries signed a pledge to support the gop nominee. The party has spoken. You signed a pledge. That pledge was not a blanket commitment that if you go and slander and attack heidi, that like a servile puppy dog. Reporter cruz insisted hes committed to unity. Some of your party are blaming you for that speech last night for sowing more division in the gop. Is that your fault . That peach . Discussing what we should stand for, what we should be standing for freedom and defending the constitution is a message of unity. Reporter cruz now clearing out of cleveland less than 24 hours after he stole the show here on night three. And vote your conscience. Reporter with those words, an eruption. I just think it was an awful performance by someone who showed himself tonight to not be a man of his word. His choice was either to be a hero of the convention and to endorse or to commit political suicide. Reporter the Trump Campaign knew cruz wouldnt endorse and still let him take the stage. It used to be said that revenge is a dish best served cold. Last night ted cruz amended that. Revenge is a dish best se bold, in front of 40 million people. Reporter that was a remarkable moment. What did you think . Loved it. Reporter trump now brushing off the drama. His task tonight, show the party can get past it and come together. A primetime pitch from the nominee no one saw coming after a week few will forget. And tonight, when donald trump takes this stage to address the delegates here, a Senior Adviser tells me to expect some kind of dramatic entrance fitting for this convention and this campaign. Lester . Hallie jackson on the convention floor. As the drama continues to play out, donald trump preparing to give that speech of his life accepting the gop nomination today and making his most important case yet against Hillary Clinton. All of it happening as trump set off alarm bells around the world with what he said in a new interview about coming to the aid of our nato allies. Nbcs katy tur has those details. Reporter donald trump trying to wrestle back the narrative. I like that. You lik just make sure nothing goes wrong. Reporter officially accepting the nomination tonight with an address expected to lay out a trump presidency. One theme, americanism over globalism. The campaign saying the speech will be run through Plagiarism Software hoping to avoid another embarrassment after team trump admitted a portion of melanias speech was plagiarized. Just one moment in what has been an unruly and raucous convention. Out of order. Reporter melania absent since the speech gaffe expected to be back in the family vip box watching as ivanka introduces trump. Im terrified. Im terrified. Ive never spoken in a stadium like this. But really, i just want to make sure i do a great job for him. Reporter the ongoing drama between trump and ted cruz drowning out comments the candidate gave to the New York Times saying he considered not backing nato allies who dont pay their fair share. Absolutely prepared to tell those countries, congratulations, you will be defending yourself, trump said. That drawing a sharp rebuke from nato secretarygeneral jens stoltenberg. Solidarity among allies is a key value for nato. This is good for European Security and good for u. S. Security, he said. We defend one another. Breaking the decadesold treaty seen as a firewall against russia could invite more hostilities in the region. Republicans denounced the comments. Representative peter king argued trump will evolve. When you Start National security briefings, are you confident that he might change some of his tone on this . I think every president ial nominee, once they start getting those briefings, its been a wakeup call. Reporter though trump is now officially the nominee, hell have to wait until Hillary Clinton gets the nomination before both will start to get their National Security briefings. Lester . All right, katy. While most others have been using the podium behind you have used it to attack Hillary Clinton, the job of telling the donald trump story, the personal story, has largely been left to his kids. I spoke to two of his sons, donald jr. And eric, earlier today. Eric was the next speaker up after ted cruz was booed from the stage. And he described to me what that moment was like as he waited in the wings. Well, i was probably 12 feet away from him. It was amazing. The whole auditorium halfway through his speech starts chanting, trump, trump. I mean, the place was electric. Almost like a hockey game. It was amazing. A couple minutes later people are waiting for the buildup, waiting for the buildup, waiting for that endorsement. He doesnt do it. He literally got booed off the stage. Did you enjoy the moment of him being booed off stage . Was there a certain satisfaction there . I was shocked that he did what he did. He comes to a convention. He doesnt really support the candidate. Right . The Republican Party has one goal and thats to beat Hillary Clinton. I was kind of surprised by him not doing that. The trump siblings strategy. I asked oldest son don jr. If he had offered advice for his dads primetime speech. So youre his son. Dad, tonight you need to do making sure were talking about party unity, conservative values, freedoms that conservatives hold so dearly and that hes going to be talking about those. You and your siblings have been effective this week trying to paint a picture of your dad, the dad that you know. At the same time, when you think about a president , strength is obviously important, but we also sometimes look for our leaders to be compassionate, to console us during national tragedy. We saw president obama in dallas a week or so ago. We havent seen that donald trump. Is this a man that can cry . Can he emote . Very much so. Can he wrap his arms around the country in times of crisis . And those who know him best, ourself, his kids, his grandkids, very close friends, you hear about it last night. Thats the guy he is. We can talk to that to youll hear it from ivanka tonight. I think we want to see it. Well, listen, we do. There actually comes a time, lester, when you actually have to lay the hammer down. You cant talk about everything with white fluffy pillows and everything is beautiful. Thats not the world that we live in. My father understands how serious the situation is. So theres a time and a place for all of that. He can do it better than anyone. Have you ever seen him cry . I have. I have. Ive seen him be very emotional. Ive seen him be very compassionate. And not just to family because thats family, but to employees that hes taken care of and have worked for him and given him so many years of dedicated service. Part of my conversations with donald jr. And eric trump this afternoon. I want to bring in chuck todd and savannah guthrie. Lets go back to the ted cruz moment. Before that he was getting a rousing reception from this crowd and a speech that when you saw it, you said its ted cruz 2. 0. Yeah, it was ted cruz 2. 0 and also i said 2020, perhaps an audition for the election in 2020. This wasnt the ted cruz we saw on the stump during the [000 09 59;00] this was a ted cruz talking about broadening the appeal of the Republican Party. He said the bill of rights protects gay and straight. He invoked lincoln signing the emancipation proclamation and the passage of the civil rights act. It was clear that he had this speech that he thought would really position him well. What is also clear in light of what happened is that he badly miscalculated this room. Things went a little sideways. Chuck, let me turn to you. The speech tonight. Two audiences the one behind us and the one in the living room. Its interesting. Donald trump is never really worried about the audience in the living room very much when hes done these rallies because he feeds off of energy in these halls that he gives. And theyre tremendous events when youre in them. Theyre very electric. Boy, this convention because really of the cruz moment has suddenly gotten electric. You can tell that trumps going to feed off of it. Thats his challenge tonight. Dont get too caught up inside here and still talk to the audience abroad and try to broaden your appeal. And i think thats going to look, this is a big challenge for him. The other thing he doesnt want to do is be too untrumplike either. So i think thi i for him. Chuck and savannah see you both at 10 00 eastern for our primetime convention coverage. Theres breaking news in the worlds of media and politics. Now official. Roger ailes, a giant figure behind the scenes in television and the gop has been ousted from his job as the head of Fox News Channel in the wake of a Sexual Harassment lawsuit by a former fox news anchor. And tonight, Rupert Murdoch himself is stepping in. Nbcs Anne Thompson reports of the shock waves being felt right now. Reporter roger ailes, one of the most powerful men in news and politics, is out. The former fox news chairman and ceo toppled following accusations of Sexual Harassment. First made in a lawsuit brought by former anchor gretchen carlson. Then this week reports that fox star megyn kelly told investigators ailes harassed her when she was a young correspondent in washington. The 76yearold ailes denied the charges. Today in his Resignation Letter to Rupert Murdoch, head of Parent Company 21st century fox, ailes made no apologies and congratulated himself, writing he takes particular pride in the role that i have played advancing the careers of the many women i have promoted. I think we certainly will see a profound transition in what fox news is, what it represents and its relationship with its audience. Reporter murdoch, who now takes over fox news, left Corporate Headquarters this evening without saying a word. In a statement Gretchen Carlsons attorney said, we hope Reputable Companies will no longer shield those who abuse women. On the night of his downfall, the party ailes spent much of his life promoting struggles to unify behind its most bombastic candidate, donald trump. In ailes, like trump, media, power and politics intersected. The former republican consultant created fox news from nothing, building it into a influential and multibillion dollar juggernaut. A man who once set the rules today found the Anne Thompson, nbc news, new york. Tonight, people across a huge part of the country are taking cover inside as a dangerous and oppressive heat wave bears down on over 100 million people. Its already been deadly and its now moving east. Nbcs blake mccoy is in the hot zone. Reporter as hot, muggy conditions continue to bake a huge swath of the country, the heat in chicago has murial caras sizzling. Pretty hot, humid, not comfortable. Sticky. Reporter her air conditioning repairman is handling triple the calls. A socalled heat dome now sits over 119 million americans prompting alerts in 26 states. In minnesota on the domes northern edge, severe storms popped up overnight killing a 13yearold boy scout and adult volunteer. A tree fell on their tents during a camping trip. More storms out east where residents in hilton head had to watch out for spouts. Theyll soon have to worry about high temperatures, too, as the heat wave expands. Really the combination of the humidity along with these extremely dangerous temperatures thats going to make it feel like its well above 100 degrees through the weekend. Reporter runners in central park are already sweating. New york city trainer Josh Margolis is telling clients to rehydrate with milk as well as water. Specifically chocolate milk has gotten a lot of traction recently because of the proteins and the sugars and the carbohydrates thats in it. Reporter a useful tip as people all over the country look for ways to beat the heat. Blake mccoy, nbc news, chicago. Theres a lot more to tell you about here tonight. Caught on camera, a man lying in the street with hands up before he was shot by police. He says he was only trying to help a man with autism in his care. The twist Police Reveal in the case late today. Well have it for you. Donald trumps big problem with female voters. Can the trump women he there goes my sensitive bladder. Sound familiar . Then youll love this. Incredible protection in a pad this thin. I didnt think it would work, but it does. Its called always discreet watch this. This super absorbent core turns liquid to gel, for incredible protection thats surprisingly thin. So i know im wearing it, but no one else will. Always discreet for bladder leaks pain. Shoots and burns its way into your day, i hear you. To everyone with this pain that makes ordinary tasks extraordinarily painful, i hear you. Make sure your doctor hears you too i hear you because i was there when my dad suffered with diabetic nerve pain. 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By his side, a 23yearold autistic man he was trying to help. I see a white male down on the ground with a gray shirt with a black male in a green shirt, shorts. Reporter police say they were responding to a Man Threatening suicide with a gun, but kinsey yelled there was no gun. Its unknown if the actual shooting was recorded on video. A different video shows kinsey after being shot in the leg. The Police Department tonight says the officer is a 30yearold white hispanic. Kinsey spoke to miami station wsvn. Because i got my hands up, theyre not going to shoot me. This is what im thinking. Theyre not going to shoot me. Wow, was i wrong. Reporter the miami police chief says the state will investigate. I personally have questions. I assure you we will reporter the Police Union Says the officer thought kinsey was in danger with the autistic man at his side and shot to save him, but the officer missed his target. Im in shock. Reporter u. S. Representative fredricka wilson. We say to our boys and our men, if youre ever stopped by the police, freeze. What could have saved him from being shot . Reporter tonight charles kinsey, a father of five, remains in the hospital. Through his attorney i want everyone to be peaceful. Reporter kinsey is calling for calm. Kerry sanders, nbc news, miami. Were back in a moment with a plane plummeting out of the sky on to a suburban neighborhood below. Have modere to severe plaque psoriasis, isnt it time to let the real you shine through . Introducing Otezla Apremilast . Otezla is not an injection or a cream. Its a pill that treats plaque psoriasis differently. With otezla, 75 clearer skin is achievable after just 4 months, with reduced redness, thickness, and scaliness of plaques. And the otezla prescribing information has no requirement for routine lab monitoring. Dont take otezla if you are allergic to any of its ingredients. Otezla may increase the risk of depression. 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