tonight, a special edition of "world news tonight." the final push. just 24 hours to go until the iowa caucuses. the new poll. donald trump in the lead. we're right there with him. >> how do you close this deal? >> his daughter and wife hoping to help seal the deal. also, hillary clinton with a razor-thin lead. but can they stop sanders' momentum? also tonight, the storm moving across the country. powerful rains, blizzard conditions. here in iowa, they're preparing for a hit. and the virginia tech student accused in the death of a 13-year-old girl. his friend also under arrest.

the fugitives, armed and dangerous. how they got them. and the jet, dumping fuel. making an emergency landing. good evening, as we come on the air tonight, the candidates are all over this state. 24 hours before the iowa caucuses. the race on both sides, too close to predict. hillary clinton with a very slight lead over bernie sanders. up here. we start with a new poll on the republican side, showing trump cruz. marco rubio in third. trump fighting to close the deal after skipping the final debate here before iowa. so many asking, will that help or hurt him? ted cruz, making news because of a controversial voter mailing. tom llamas leading us off, right

>> reporter: tonight in iowa, donald trump and his family trying to close their biggest deal of all. >> he will be unbelievable. the best deal maker, the best master negotiator. >> reporter: shaking hands, signing autographs, even holding babies. an all-out push to turn poll numbers into real votes. >> i don't care if you have a 104 temperature, the doctor says you can't leave. it will be the end of you. you can't leave, you won't be able to make it. get out of bed and caucus. >> reporter: the man that wants to win iowa, his wife by his side. how do you close this deal? >> we'll see what happens. we've done really well in iowa, the evangelicals, the tea party. everybody is really liking us. result. iowa is a very special place. >> reporter: the whole trump family involved.

>> just write down trump. and you are done. that's it. very exciting. >> reporter: and trump's sons, at a shooting range. sounding a lot like their dad. >> he's doing very, very well in a poll. listen, fingers crossed. >> reporter: trump in church today, receiving a blessing from the pastor. ted cruz, also attending church. both candidates competing for the key evangelical votes. did you pray for victory? >> i prayed for god's will to be done. >> reporter: did you pray for trump and rubio? >> i actually did. i'm lifting up in prayers all the candidates that are running. i asked that god's blessing, peace, and love be upon them. >> reporter: cruz under heavy fire from trump. >> a lot of people say cruz can't run for the election. he was born in canada. to me, that's a big problem.

cruz as the favorite. setting expectations sky-high. >> ted cruz is clearly the front runner. 10,000 volunteers, spent millions of dollars. >> reporter: rubio, polling in third place, hoping for a cruz crash. and leaving iowa voters with this promise. >> i will never embarrass you. you will never cringe and say, i can't believe i voted for him. >> and tom llamas with us live in iowa. you were there with melania trump, did she seem eager for what will come? and also, sarah palin back on the trail tomorrow for trump? >> yes, melania is very excited, and thinks tomorrow will be great. the entire family will stay in iowa. and yes, palin will be with trump tomorrow. and staffers tell me they're confident but anxious. one top-level aide tells me, very few people have won the iowa caucuses. david? >> tom llamas tonight. tom, thank you. now to the democratic side, and hillary clinton bringing in

and this race is very close. the newest poll has clinton at 45%, sanders at 42%. a statistical tie. secretary clinton campaigning with her family in her final push. warmer words toward sanders, and appearing confident. but the sanders team, raising more than $20 million in january alone. they say nearly all, from online donors giving about $27 each. cecilia vega tonight on the battle between the two for the best ground game here in iowa. >> stick with me. stick with a plan. stick with the experience. >> reporter: 24 hours to go, and hillary clinton is counting down. >> come out and caucus, don't worry about the weather. >> reporter: bringing in reinforcements for the final push. >> please join me and welcoming, i hope, our next president, my mom. >> reporter: not just chelsea. the entire family center stage this weekend. >> thank you, bill. thank you, chelsea.

not stacked against them. >> reporter: tonight, hillary feeling the love. >> go as far as their hard work and talent will take them. >> reporter: and packing in the crowds. this is just the line to get inside to see hillary clinton. look at how far back it stretches. today, clinton traveling more than 300 miles in iowa. sanders, clocking in nearly 200. but today, sanders is confident. >> love you, too. >> reporter: on the stump, a message of unity. this land is your land this land is my land hours, the vermont senator on the attack. him. >> dismantle health care? i've spent my life fighting for universal health care for every man, woman and child. >> reporter: and clinton, still on the defensive over the bomb

e-mails on her private server, now deemed top secret. saying it's a dirty trick. >> i have to point out the timing and some of the leaks are concerning. i just want the matter resolved. >> cecilia vega is with us live from iowa tonight. hillary clinton knows what this is like. eight years ago here, on the night before her iowa loss. they're taking no chances, they're actually rehearsing turnout? >> yes, 2,000 people showed up for a dry run on friday. and volunteers are sending hand-written notes. and sanders' team knocking on more than 75,000 doors this weekend alone. no detail is too small in a race like this, david. >> a lot of work on both sides. thank you. so, how do you get first-time voters out to caucus?

voters? here's jorn jonathan karl. >> reporter: one of the many it's boots on the ground time in iowa. armed with detailed information on every door they knock. >> sometimes you show up, they've switched to trump. and i think, how is that possible? >> reporter: we're at rubio supporters, calling people to make sure they know where to go >> sergeant bluff community center. >> reporter: this volunteer is a student at iowa state. you're calling people over and over and over again. are they okay with that? >> you do get those callers that are like, hey, i've been called like three times this week. >> reporter: in addition to the visits and calls, iowans are bombarded with 60,000 campaign adds, 17,000 this month alone. >> donald trump? new york values. >> clinton and bush. two names from the past.

the junk mail. some iowans received this election alert. score, whether they've voted in recent elections. caucus on monday to improve your and information about their noibs. caucus on monday to improve your score, it says. warning of a follow-up notice after the event. it's from the cruz campaign. over at this diner, these folks are still truly undecided. when are you going to make that >> maybe 7:00 p.m. tomorrow. i don't know. >> jon, meet you at the diner first thing in the morning. but the biggest prize tomorrow could be the first-time voters that have never voted before.

have a 104-degree temperature, you still need to go out and caucus. >> that's right. both are counting on a big showing from those that have never caucused before. if they get it, they win. if not, they lose. >> jon, thank you as always. "good morning america" will be live from iowa tomorrow. and i'll be here tomorrow night from iowa. the whole team with results as they come in. and the next big debate, after iowa and just days before new hampshire. join martha raddatz and me, the republican debate next saturday night, right here on abc. and the other factor playing into the iowa caucus, the weather. trees down in southern california, lanes on the 101 and the pacific highway shut down because of flooding.

the map showing the reach of the storm, getting to the great lakes on tuesday. and it will hit here right after the caucuses are wrapped up. everybody is hoping so. in the meantime, we turn to a disturbing case making national headlines this sunday. breaking developments in a murder investigation, a virginia tech student arrested, and his friend, too. all of in in connection with a 13-year-old girl that vanished. here's eva pilgrim. >> reporter: tonight, two virginia tech students under arrest. in connection with the death of 13-year-old nicole lovell. >> late saturday night, the eisenhower, a virginia tech student. >> reporter: police say he was charged with kidnapping and murder, knew the victim, and used that relationship to his advantage. he's an engineering major and a track store.

accessory, accused of helping him to get rid of the body. lovell's parents say she disappeared after climbing out of her bedroom window. more than 1,000 volunteers searched. she had a liver transplant and needed daily medication. >> i didn't think that would happen to her. because she was always the cutest little thing. >> reporter: saturday, police discovered her body 80 miles away. her father, breaking the news on facebook. tonight, both suspects being held without bail. eva pilgrim, abc news, new york. >> thank you. to california tonight, and the dramatic takedown. the hunt for fugitives considered armed and dangerous. we've been reporting on the three suspects that escaped, tying sheets together to rappel down the building. authorities saying they got help from a woman in the jail.

here's matt gutman. >> reporter: they rappelled down but tonight they were hauled back in through the front door. over suspects that may have helped. tip that helped with the capture of nayeri. police chasing him. down. >> reporter: nine days ago, they hacked a doggie door in this greating. then knave navigate ing tunnels to the roof. and a teacher supplied them with google images. and also sent mushy love notes to nayeri. he's been described as a psycho path. is that a fitting description? >> i think it is. >> reporter: the three are being held in a different section of the maximum security jail, but separately this time.

>> matt, our thanks to you. concerns over the spread of the zika virus. the world health organization holding an emergency meeting tomorrow. it's spread by mosquitos. birth defects. the number of infected people growing. here in the united states, 37 cases in 12 states. now to an emergency landing for a chicago-bound jet. some scary moments here. a passenger shot this video of special edition of "world the jet dumping fuel as it headed back to london. the 747 did make a safe landing. there's still much more ahead on "world news tonight." the "real money" team is back. with this question, with airlines posting record profits, why are our tickets not cheaper? our reporter getting answers. plus, three ways to save on your

also tonight, the mystery flash this weekend. what was lighting up the skies over several states? and, it's the awards show that comes every year before the oscars. what happened that won't happen at the oscars? and the new message from the winners after so much outrage. what if one piece of kale could protect you from diabetes? what if one sit-up could prevent heart disease? one. wishful thinking, right? but there is one step you can take to help prevent another serious disease. pneumococcal pneumonia. if you are 50 or older, one dose of the prevnar 13 vaccine can help protect you from pneumococcal pneumonia, an i ss that can cause coughing, chest pain, difficulty breathing, and may even put you in the hospital. even if you have already been vaccinated with another pneumonia vaccine, prevnar 13 may help provide additional protection. prevnar 13 is used in adults 50 and older to help prevent infections from 13 strains of the bacteria that cause pneumococcal pneumonia. you should not receive if you have had a severe

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the white-hot fireball soaring across the sky in washington, d.c. seen as far away as ohio, no official word if it was indeed a meteor. we turn to the s.a.g. awards. after all that oscar backlash we've been reporting on, take a look. >> i don't know what to say, two wins in one night. that's incredible. >> idris elba, winning two awards. leonardo dicaprio, winning best actor for "the revenant." >> to my parents, thank you for listening to an overly ambitious, slightly annoying 13-year-old kid. >> dicaprio, getting a hug from his "titanic" co-star, kate winslet. when we come back, it's not all serious business in iowa. you won't want to miss this

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>> reporter: here in iowa, the circus is in town. and it's the greatest show on earth. hello sioux city >> reporter: politicians channeling pop stars, taking potshots at ducks. >> ted cruz is my man. i'm voting for him. >> reporter: there's even an iowa caucus musical. they're always on my channel >> reporter: a high-calorie process that starts with meat on a stick at the state fair. and often comes down to the pizza ranch strategy. and every four years, a bumper crop of candidates. tomorrow is harvest day. david wright, abc news, des moines. >> harvest day indeed. thank you for watching. i'm david muir, i'll see you