President ial race so far. Tonights Republican Debate could be a complete gamechanger. The debate field now witled down to seven candidates. Donald trump, right there in the mix after skipping that iowa debate. Latest poll numbers just coming in showing he is still the clear frontrunner. Marco rubio and ted cruz, right there, tied for second place. And this is a live look at the debate hall, right now. The Energy Building across this state, but especially right here, where the candidates will soon face each other and the nation. Our team is covering it all and abcs tom llamas starts us off. Reporter tonight, the stage is set. And candidates like senators ted cruz and marco rubio getting a feel for the stage that could change the direction of this race. Rubio expected to take on the most fire tonight. His poll numbers rising, and so are the attacks against him. Like, from cruz, who is reminding voters who really won in iowa. What did you think about the finish of marco rubio . Thats an odd collection of words, impressive, third place finish. Reporter rubio calling out cruz after suggesting dr. Ben carson was dropping out of the race, which was not true. If you get a call on tuesday night saying that i dropped out, it isnt true, its a lie. Reporter and donald trump, leading in the polls here, but the race is tightening, starting the fight early, tweeting today, wow, jeb bush, Whose Campaign is a total disaster, had to at me. Not nice. Vote for jeb. Reporter but that tweets not stopping 90yearold barbara bush. He doesnt give many answers to how he would solve problems. He sort of makes faces and says insulting things. Reporter jeb, bringing in his famous mother to help lift his campaign off life support. Today, an encouraging sign. A crowd of more than 600. Bush says hes his own man, but wont run from his famous last name. People are just going to have i am who i am, you know . Establishment. Reporter bush, part of the pool of governors, hoping for a miracle in New Hampshire. Today, kasich getting a boost from another notable republican governor, arnold schwarzenegger, who compared him to that bullet proof robot that make him famous. Ever. Never give up. So, this is you. You are the terminator. And tom is right here with me inside the debate hall. Tom, youre hearing one of the biggest fights tonight might actually be a rematch . Right. Get ready for jeb bush versus marco rubio, part two. Hammering rubio. Hes been relentless, saying rubio has no accomplishments. A top bush aide calling rubio a noshow lobbiest. The Rubio Campaign says that bush is desperate. Stage, they will be standing right next to each other. Anything could happen. Tom llamas covering the republican race every step of the way. Tom, thank you. Tonights debate could shape the direction of this race. Nearly half of all Republican Voters in New Hampshire havent yet made up their minds. So, what are they waiting to hear . Heres abcs jon karl. Reporter as the candidates make the final push in New Hampshire show time is over. Its game time. Reporter the republican race is tightening. Donald trump still leads all the polls, but marco rubio is rising. And cruz, kasich and bush not far behind. Its just three days to go before the primary, and at the chez vachon diner, we found folks ready to pick a president. Well, almost. Clearly youve made up your mind now, right . Well, we havent. Reporter you havent made up your mind . We havent made up our mind. Reporter hes not alone. Amazingly, more than 40 of likely Republican Voters in New Hampshire say they still havent made up their minds. Rubio or cruz. I think were stuck on will we actually have the nerve to vote for trump . I mean, thats really where were stuck. Reporter so, when you go in there, are you able to pull the lever for donald trump, is the question. A year ago, i couldnt imagine voting for trump. Reporter but there are two groups who seem totally decided. Those who like the frontrunner donald trump. Reporter no matter what . No matter what. I heard him. I liked what he had to say. Im voting for him 100 . No changing my mind. Reporter and those who dont. I definitely know i would not vote for trump. Thats all i really know. Reporter but New Hampshire voters have a long history of making up their minds late, and surprising everybody. After barack obama won the Iowa Caucuses eight years ago, he was way ahead in the polls here in New Hampshire, but ended up losing to Hillary Clinton. This time, its the republicans who seem most undecided. So, when will you make up your mind up, finally, totally make your mind up . Last debate. And so many people still waiting to make up their mind. Jon joi me now inside the debate hall, too. Jon, donald trump not at that last debate. He will be here tonight. What are you hearing from the campaigns about his strategy . Reporter well, cecilia, his Campaign Manager says if trump is attacked tonight, he will respond times ten. But the real question here is, which donald trump is going to show up tonight . Over the past few days, we have seen him go nuclear on ted cruz, saying that he cheated in iowa, and weve also seen him show incredible restraint and say message. Well see which one shows up. We shall see. Jon, thank you. And abc political analyst matt dowd is here with me, too. Debate. Who wins, who has the most to lose tonight . Its a Pivotal Moment for all seven up there. I would focus on three of them. First, john kasich has put all of his chips on the table here and he has to figure out a way to get in second and third. That from. Jeb bush is another one who has the most to gain. Hes spent more money than any other candidate in this race. If he doesnt get in the top four, his candidacy is on life support. And finally, donald trump has the most to lose. Donald trump comes into this race with doubledigit lead. He has led 70 straight polls since august in this state. And as we know, New Hampshire voters are theres a ton of late deciders. He has to do well here to keep that lead going. All right, the whole team here following it all. That countdown is on for the democrat candidate, too. Bernie sanders, the favorite son here. Hillary clinton, the understood dog. She was out, going door to door herself today. He will have a National Audience later tonight. Abcs david wright on the trail. Its a Beautiful Day in manchester reporter Hillary Clinton may be down in the polls here in New Hampshire, but dont count her out yet. Well, i need your help on tuesday, convince some others to come along. Out pounding the pavement, knocking on doors, trying to make up ground against bernini sanders. I feel like a rock and roll star. Reporter sanders has accused clinton of being wall streets favorite democrat, not progressive enough. I have spent my entire adult life trying to knock down barriers. Reporter today, Madeleine Albright joined clinton, appealing to women, in particular. Just remember, theres a special place in hell for women who dont help each other. Reporter but some of the people attending clintons own event agree with sanders. Probably for bernie sanders. Im actually a bernie supporter. Reporter you are . But are you here at this event . I am. Reporter do you feel like you are behind enemy lines . Kind of. Reporter today at a town hall at new england college, the first queueioner made a freudian clip. Secretary sanders opponents name young people support bernie sanders, but i support you even if you dont support me. Reporter tonight, reporter the sanders surge here is clearly a nuisance for clinton. But it will be interesting to see how seriously the republicans take him. Cecilia . I think thats safe to say. David, thank you. And, of course, the debate, you do not want to miss it. Just moments away. David muir and Martha Raddatz moderating at 8 00 p. M. Eastern, right here. But we do now move on to other news. That deadly crane accident in new york city. The move that went out of control, and the cranes sudden collapse, caught on camera. The cab of that crane landing upside down, its arm smashing onto cars below. One man killed, three others injured. And abcs phillip mena on the latest in the investigation tonight. Reporter tonight, a massive job. Moving this collapsed crane, all 565 feet of it. To tear it apart, after it came crashing down friday morning in new york city. Killing one and injuring three, crushing cars and sending this counterweight into a building. You can see all that debris still on the road there. Some of it came from the top of that damaged building, where part of the crane still lies. The unanswered question tonight, what triggered the collapse . Officials looking closely at the wind and snow conditions. Can figure out exactly what happened . You know, i think youre going to have to give us a couple of weeks at least while we do some calculations, go through the metal and how it failed. Reporter Officials Say the operator tested negative for drugs and alcohol, and has been cooperating with the investigation. This crane is so big, that workers are having to cut it into 35 pieces just to clear it from the street. Cecilia . Phillip, thank you. To a health alert now. The cdc apologizing tonight after a controversial it says women should refrain from drinking alcohol, saying the ris to babies is too high. The reaction has been fierce, many women saying that advice goes way too far. Heres abcs gloria riviera. Reporter women across the country, sounding off against the cd cs new alcohol guidelines. Makes no sense to me. Are you serious . Is this really what you feel your sister, your daughter . Reporter while many women support the cd cs longstanding warning about the dangers of drinking while pregnant, the new guidelines hit a nerve, because they go further, telling Health Professionals to advise a woman to stop drinking if she is trying to get pregnant or not using Birth Control with sex. Outrage exploding on social media. Calling the advice patronizing and sexist. The women we spoke to, telling us they can be trusted to make smart, safe choices. I really do feel they are overstepping their boundary in with their own body. This is, perhaps, the right intention, with a very wrong execution. Reporter the cdc points out, half of all pregnancies in the u. S. Are unplanned. Many women dont know they are pregnant for several weeks. Possibly unintentionally putting their child at risk. Today, the cdc telelng abc news, we were sorry some people took offense at our communications. The cdc is standing by its advice, which, it says, was only intended to clearly explain the unborn child. Cecilia . Gloria, thank you. And the debate set to take place here in this hall is not the only showdown this weekend. The super bowl not less than 24 hours away. More than 100 Million People will be watching. The stage is set in san francisco. And abcs ryan smith has the big ticket. Reporter super bowl frenzy in full effect. Just 24 hours before super bowl a clash of footballs titans. Alltime great Peyton Manning and the dazzling, dynamic cam newton you dont go 171 as a starting quarterback without being awesome. Peyton manning will always be about alltime great. Reporter and to set the bar even higher, bruno mars confirming he will be apart of the highly anticipated super bowl halftime show. Joining cold play and beyonce. Security, not taking a backseat. Were standing here in one of the Security Operations centers for the super bowl. There are multiple ones so they can back each other up. And what are they looking for . Well, they are looking on the streets, the stadium, the air space, to make sure that super bowl sunday is a safe one. Safety is paramount. For players and fans alike, hoping the 50th super bowl is one for the ages. So, who will win the super bowl here at levis stadium . Carolina panthers at 5. 5point favorites. Most people here have the broncos as the sentimental choice, they are picking the panthers to win it all. Cecilia . Ryan smith right there on the ground, thank you. And still ahead on this special edition of world news tonight, the threatening phone calls to watch out for. Dont disregard this message and do return the call before we take any action against you. A tax scam warning. Why you may soon be more at risk than ever before. And, later, the president of a fraternity at an Ivy League University under arrest. The allegations rocking that campus tonight. Got his fraternity suspended. Everyones lookin red carpet ready. My man, lemme guess who youre wearing. Toenail fungus . Whaaat . . Fight it with jublia. Jublia is a prescription medicine. Used to treat toenail fungus. Use jublia as instructed by your doctor. Jublia is workin it most common side effects include. Ingrown toenail,application site redness,. Itching, swelling, burning. Or stinging, blisters, and pain. Oh fight it with jublia now thats a red carpet moment ask your doctor if jublia is right for you. There has to be a way. Carry the centimeter, divide by 3. 14 something something something. [ beeping, whirring ] great caesar salad and now the name your price tool shows people policy options to help fit their budget. Is that a true story . Yeah people really do save an average of over 500 when they switch. I mean about you inventing it. I invented the story, and isnt that what really matters . So. What else about me . Whether we like it or not, tax seasons here. Tonight, a warning. Get their hands on your money. And those suspicious calls and threats cost americans millions. Heres abcs ron claiborne. Within the next hour, they will be at your doorstep to hand you have you and put you behind bars. Reporter the government is warning americans to be on high alert for a phone scam that is bilking americans out of millions. This chicago area woman got a call like that in december, from someone claiming to be from the irs, demanding she pay thousands of dollars in back taxes. And if we dont, theres a warrant out for our arrest. Reporter scared, she wired 10,000 to an account in seattle. It was all a scam. The irs says, since october 2 2013, 5,000 victims, losing more than 26 million, to people tre tending to be irs officials. So, how do you protect yourself . For years, the government has had this simple message. The real irs will generally first make contact by letter and will never demand immediate reporter but starting next month, a new l requires the irs to hire collection agencies to help collect taxes. And those agencies may call taxpayers. In the future, when collectors are actually calling on behalf of the irs, people will be more likely to fall for that scam. Reporter paying taxes they dont owe. Ron claiborne, abc news, new york. And when we come back, held hostage during that bonnie and clyde describe spree, how the dangerous couple held one family for hours. What theyre saying tonight. And fading out . Why some of our favorite candies might soon look a bit different. Type 2 diabetes doesnt care who you are. Man woman or where youre from. City country were just everyday people fighting high blood sugar. I am everyday people. Farxiga may help in that fight every day. Farxiga helps lower blood sugarin adults with type 2 diabetes. One pill a day helps lower your a1c. 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The florida family held hostage for three hours. Suspect Blake Fitzgerald was later killed in a police shootout. Brittany harper is . Custody. And, a candy giant making some healthy changes. Mars is vowing to remove all artificial coloring from its products. The plan is to come up with healthier ingredients to create those vibrant colors over the next three years. Still ahead, it is almost time here. We are just waiting for the candidates to take the stage, so, what happens when theyre all backstage . We go behind the scenes, when we come back. I use whats already inside me to reach my goals. So i liked when my doctor told me i may reach my blood sugar and a1c goals by activating whats within me. With onceweekly trulicity. Trulicity is not insulin. It helps activate my body to do what its supposed to do release its own insulin. Trulicity responds when my blood sugar rises. I take it once a week, and it works 24 7. It comes in an easytouse pen and i may even lose a little weight. 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And click to activate your within. At ally bank, no branches equals great rates. Its a fact. Kind of like grandkids equals free tech support. Oh, look at you, so great to see you none of this works. Come on in. This is sheldon whose long day setting up the news starts with minor arthritis pain and a choice. Take tylenol or take aleve, the 1 recommended pain reliever by orthopedic doctors. Just two aleve can keep pain away all day. Hi hey you look good. Thank you, i feel good. It all starts with eating right. Thats why i eat amaz n prunes now. Theyre delicious and help keep my body in balance. I love these. Sunsweet amaz n prunes, the feel good fruit. And finally tonight, it is almost showtime. We got to go behind the scenes today, behind this stage here, behind me. The tricky part . Keeping all these candidates from passing each other in the hallway before they come out, right here. The stage is set, the finishing touches complete. You knew all that. Underneath those podiums we are in the athletic center. The candidates wont cross paths until theyre ready to take the stage. Take a look at this. This is one of the candidates dressing rooms. Maybe he wants to ride an exercise bike . Long hallways. Arrows telling the candidates where to go. This is a racket ball court, candidates will be this there. No candidates in there. Here we go. The long walk to that stage. Guys ready . Reporter and then, all those rivals standing there, waiting sidebyside until their name is called. Donald trump. Reporter its rehearsal time today. The fillins, students playing the role of a lifetime. As you can see, this is not the real jeb bush. I mean maybe. Im you have a good oneliner . The kneeldown. I got it perfectly. Im always staring at marco whenn he says something, too. Best Chris Christie face . The whole gang is here. Oh, hi, david and martha. Ready to go. And it all starts applause, applause. City applause. And go. And here we go, in just a matter of moments. You can see all the people gathering right here behind me, getting ready for this big showdown. It will be a mustwatch tonight. Well see you back here soon. Announcer if youre looking to make more money and take control of your personal and financial future, then get ready, because than merrill, the flip this house, one of the