> this is "nightline." tonight, trump, with his family by his side, accepting his party's nomination, painting a bleak picture of america. plus, being trump. how did he go from businessman to reality star to presidential nominee? from growing up in queens, new york, to his time in military school, to the building of an empire. and, shakeup at fox. roger ailes out after

allegations of sexual harassment. but first, the "nightline" five.

♪ and good evening from cleveland. where workers are busy popping all the balloons that fell from the rafters after donald trump formally accepted the republican nomination. it was a long and heated ending

to chaotic week. donald trump delivering the most important speech of his life. did he convince skeptical americans? he have a view from the floor. donald trump, a businessman and reality star with no political experience, now the republican nominee for president of the united states of america. streamers and balloons inside the hall, fireworks outside. he simply strode onstage, giving a kiss to his daughter ivanka. >> usa. usa. >> reporter: at times during this week, the room has been a little flat. but not right now. everyone on their feet. >> i humbly and gratefully

accept your nomination. >> reporter: he painted a dark picture of an america beset by threats at home and abroad. and presented himself as the savior. >> the crime and violence that afflicts our nation will soon, and i mean very soon, come to an end. beginning on january 20th of 2017, safety will be restored. >> reporter: he doubled down on his signature campaign promise. >> we are going to build a great border wall to stop illegal immigration. >> build that wall! >> reporter: but it was a more restrained trump than we often see at rallies. when a protester interrupted, he held his tongue. >> how great are our police?

>> reporter: at this time of national upheaval, trump vowed to protect police officers. >> i am the law and order candidate. i will do everything in my power to protect our lgbtq citizens from the violence and depression of a hateful foreign ideology. and i have to say, as a republican, it is so nice to hear you cheering for what i just said. thank you. thank you. >> reporter: on the economy, he talked about his plans to cut taxes in regulation, and renegotiate trade deals. >> i've made billions of dlollas in business making deals.

now i'm going to make our country rich again. >> i think you had a meandering speech, and i think a gloomy one. >> reporter: 13 months ago, very few thought he would make it this far. >> i am officially running for president of the united states. >> reporter: trump was written off by pundits, considered a caricature, known for his hair and catch phrases, and commercials. but there he was tonight, with polls showing him in a tight race against hillary clinton. for whom he reserved some of his toughest rhetoric. >> isis has spread across the

region and the entire world. libya is in ruins. this is the legacy of hillary clinton -- death, destruction, terrorism, and weakness. >> reporter: he also hit clinton hard over her e-mails. >> and when a secretary of state illegally stores her e-mails on a private server, puts our country at risk. lies about it. in every different form, and faces no consequence, i know that corruption has reached a level like never, ever before in our country. >> reporter: toward the end of his lengthy speech, trump turned sunnier. >> it is time to show the whole world that america is back. bigger and better and stronger

than ever before. >> reporter: and then he wrapped it all up, with a return to his now yubiquitous mantra. >> we will make america strong again. we will make america safe again. and we will make america great again! god bless you, and good night! i love you. >> reporter: did he make it somewhat easier for americans that may be on the fence about him to imagine him in the oval office? >> only if you're angry. if you're upset, dislocated, disconnected in some way, you found lots of things to like. >> my father told me, if you're thinking anyway, you might as well think big.

>> reporter: he was introduced by ivanka trump. >> i remember playing on the floor, constructing miniature buildings with legos while did the same with concrete, steel, and glass. >> reporter: trying to appeal to women. >> at my father's company, there are more female than male executives. we are paid equally for the work we do. and when a woman becomes a mother, she is supported, not shut out. >> reporter: an ending to a convention, first anti trump delegates briefly tried a floor rebellion. then there was melania's speech,

cribbed from michelle obama. >> you work hard for what you want in life, your word is your bond. >> you work hard for what you want in life, your word is your bond. >> reporter: and last night, former rival ted cruz booed for refusing to endorse trump. >> vote for candidates who you trust to protect your freedom. >> reporter: this morning, cruz appeared in front of delegates from his home state of texas. >> are you going to vote for trump? >> reporter: he defended his decision not to endorse, saying that trump insulted his wife's looks, and intimated that his father was involved in the assassination of jfk.

afterwards, arguments broke out. >> convention are remembered for moments. i think some will be remembered, including the plagiarismer earl in the week. some republicans said it could not have gone worse in the early days, and the final speech seemed to go on for a long time. >> reporter: and the closing song, "you can't always get what you want." and trump mentioned the term lgbtq more than god. welcome to the age of trump. and how did he go from queens, new york, to a builder of bui buildin buildings, to a presidential

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♪ as the crew here in cleveland cleans up the streamers and balloons after donald trump's big speech, we want to talk about the man who has taken one of the most unusual routes imaginable to becoming a presidential nominee. here's juju chang with our series, being trump. >> and i will be your champion. >> reporter: before he was the republicans' best shot at the white house, before he was

firing people on the apprentice, even before he was a billionaire, reshaping the manhattan skyline, donald j. trump was a boy from queens, the son of an immigrant, and a developer. >> robert had a set of blocks, and i had a set of blocks, and i asked robert if i could have his blocks, and i built a building, i liked it so much that i glued it together, and he couldn't have his blocks. >> what do you think that says? >> i'm not much different than i am now. >> reporter: before he graduated from college, he was already working for his father's company. >> in the beginning, if you read "art of the deal," he was

always exaggerating in the beginning, but being able to trump that up really put him on the map. >> when you look at the wonderful skyline, do you say, i own that, that, that? >> i look at the skyline and i really say, it's the greatest in the world, and i'm very proud to be a part of it. i would like to buy everything, if it were possible. >> i bet you would. how about central park? >> no, donald trump shouldn't be allowed to touch central park. >> reporter: he may not have bought it, but his name is on the ice rink and the carousel. >> you have said that success is a kind of drug. how do you handle it? >> a lot of don't know how. >> reporter: he turned himself into a brand, making cameos in movies like "home alone 2." and popping up on shows

like "fresh prince of bel air." he perfected his showmanship. >> everything is luxury. >> reporter: but of course, there have been failures, trump vodka, steaks, and trump university. all business blunders on the don's record. and he hasn't always been lucky in love either. his first marriage to ivana. and alleged affair with marla maples. >> nobody wants to see the tabloid one-liners, that wasn't very charming. >> reporter: but third time seems to be the charm.

melania said they are very happy together. >> he has been married twice before. did you have any concerns? >> no, we have a great chemistry, and to be with a man as my husband, you need to know who you are, have a very independent life as well, and supporting him, you need to be very smart and quick, and be there for him when he needs you. >> reporter: just last june, he decided his country needed him after toying with the idea for decades. once telling oprah, he wouldn't run unless it was critical. >> if it got so bad, i would never want to rule it out totally. because i really am tired of seeing how we're making other people live like kings and we're not. >> reporter: from the beginning, it's been an unconventional campaign. declaring in a candid, and to

many, offensive speech. >> mexico is not sending their best. they're bringing drugs, crime, they're rapists. >> reporter: his run originally met with skepticism. not considered in line with an applicant for the white house. >> this is your worst nightmare. >> could he actually win? >> no freaking way! >> reporter: but his confidence never wavers. >> they say, is he a nice person? and i think actually i am a nice person. but i think the thing that will surprise people, i will be a uni unifier, bringing people together. including blacks and whites and everything. i think people will come

together. >> reporter: at least tonight, he brought this crowd together. >> i will fight for you, and i will win for you. [ cheers and applause ] >> reporter: but can he build enough steam to become the 45th president of the united states? 109 days to go. for "nightline," i'm juju chang, no new york. next, the women that provoked a dramatic shakeup at fox news. one of media's biggest names out tonight, after charges of sexual harassme harassment. ♪ take on the unexpected with a car that could stop for you. nissan safety shield technologies, available in the altima, sentra and maxima. now get 0% apr for 72 months,

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♪ while donald trump was enjoying his moment of triumph tonight, one of the biggest names was experiencing a fall from grace. >> first, it was gretchen carlson allegeding unwanted sexual advances against roger

ail ailes. then megyn kelly claiming she was sexually harassed ten years ago. ailes denying both claims. but today, this bombshell, the man that built the fox news empire, roger ailes, has stepped down. in a resignation letter, ailes writing, i will not allow my presence to become a distraction. >> he invented fox news, and for 20 years, has been fox news. there's nothing at the network he has not single handedly created, developed grown, and produced. >> reporter: tonight, attorneys for carlson telling abc news her extraordinary courage has caused a seismic shift in the media world. >> thanks for watching us

tonight. >> reporter: rupert murdoch, leaving nothing to chance in this important election season. now, taking over, stepping in, as acting ceo. for "nightline," i'm rebecca jarvis in new york. >> thanks for watching. "gma" tomorrow, and we're online 24/7 at abcnews.com and on facebook. thank you for watching and good night from cleveland.