The stakes are too high. I hope youll go and stand up for me. I hope youll fight for me. Sounds like you want to make a political revolution. [ cheers and applause ] a major winter storm has got its eyes set on iowa. Important to note how this will affect your caucuses. The bulk of the snow starts beyond midnight on tuesday. The World Health Organization is meeting over ways to battle the growing zika virus outbreak. The group could decide to declare the virus a Global Health emergency. Virginia tech students charged with the abduction and murder of a 13yearold girl. You never get over Something Like that. Amtrak investigating objects that struck a train near new york. Everybody said, my god, its a gunshot. The broncos and panthers are in california. All that. Ted cruz is hoping to it a she wants nothing to do with it. Nearly struck by lightning. Oh, my god all of that matters. Welcome to diverse tv. Idris elba summed up the Screen Actors Guild award with that oneliner. Ive often been told im not thin enough, im not white enough. Damn it, i am enough. On cbs this morning. I joke, i say, if youre sick, if youve got 104 temperature, right, ive been doing this, if your doctor says you cannot leave your bed, you wont make it, it doesnt matter. Get up and caucus. Get up and caucus. Announcer todays eye opener brought to you by toyota. Lets go places. Welcome to cbs this morning. The first votes are about to be cast in one of the most of the heated president ial contests in modern history. Caucuses tonight. Voters will gather in libraries, school gyms, and private homes. Races. And turnout will be key. Democratic rivals Bernie Sanders and Hillary Clinton are neck and neck. And well talk with the former secretary of state shortly. 12 candidates are in the republican race with donald trump and ted cruz fighting for first place. First time caucusgoers could decide the outcome. Our correspondents and political director are on the campaign trail in iowa. We begin with Major Garrett with the political showdown. Major, good morning. Reporter good morning, and welcome to camp cruz. This is one of two dormitories the campaign has rented here in des moines. Im keeping my voice down because everybody is still asleep. More than 130 volunteers from 31 states have come to iowa to campaign and mobilize voters for ted cruz. And they do it the Old Fashioned way. One voter at a time. Ted has been consistently conservative. No flipflops. Cruzs iowa headquarters hit the phones sunday. We have a lot of leadership in washington who are kowtowing to the president. Reporter part of a mobilization effort considered second to none. Wow reporter on the stump in des moines, cruz implored his supporters to show up. 7 00 p. M. Tomorrow night, stand with us. Caucus with us. If we stand together, we will win. Reporter the Cruz Campaign also sent this flier, which looks like a government document, highlighting voting violations, to boost turnout among undecided voters. Iowas secretary of state questioned the hardball turnout tactic. So did donald trump. Its like an official document being sent to people in iowa that they have to get out and vote because theyre in violation. I said thats a fraud, its really terrible, as far as im concerned. Reporter cruz supporters a less typical one. Lets call donald duck and try to get him to do a debate. Reporter deploying duck dynastys Phil Robertson to attack your rival for skipping a debate. Trump uncharacteristically downplayed the Iowa Caucuses. Do you have to win in iowa . No, i dont have to winner it. We have a fairly substantial lead in iowa. I would like to. Reporter trump has relied on personal persuasion. If your doctor says you cannot leave your bed, you wont make it, it doesnt matter. Get up and caucus. Get up and caucus. Reporter trump has no dormitory for volunteers, but he does have sarah palin, who will campaign with him later today innin cedar rapids. Theyre totally committed to him, thats the highest in the field. But trump is almost no ones second choice. That could give cruz an advantage among caucusgoers who could still change their mind. Major, thank you very much. The Des Moines Register poll has predicted eight of the last nine iowa caucus winners. A lot of focus is on who will finish third. Marco rubio is currentlyn third place in the latest poll. Dean reynolds is in the state capital in des moines with mainstream republicans trying to dean, good morning. Reporter well, if the polls are right, the big loser tonight establishment. And the big question is what impact that defeat will have on the race Going Forward. Ive got Terry Branstad at home. I look at it for inspiration. Reporter governor Chris Christie shared the stage with Iowa GovernorTerry Branstad, a and an icon of the party establishment. I cant wait to get into the white house and call Terry Branstad and say, help me fix america the way you fixed iowa. Well do it together. Reporter senator marco rubio in cedar rapids implored the crowd. Vote for someone who gives us a chance to win. Reporter polls say neither he, christie, jeb bush, nor john kasich have much of a shot in iowa. Youve got to have a winner this time. Youre going to have a winner. Reporter with Iowa Republicans more inclined toward donald trump or ted cruz. God bless the great state of iowa. Reporter rubio and the rest are pinning their hopes on the next contest in New Hampshire. Well be leaving as soon as the caucus is over and well be in New Hampshire tuesday morning, ready to work. Reporter so for them, iowa is a scramble for third or fourth place. Of picking president s, though. Reporter governor branstad has not endorsed any candidates but has appeared with the ones he likes and not appeared with the ones he doesnt. We have more candidates than weve ever had. I think well have a record turnout. I respect the outcome from the Iowa Republican caucusgoers. Reporter now, losing iowa is not always politically fatal. Of the many losers here, Ronald Reagan was one who lost in 1980, but went on to win the presidency later that year. An important reminder. Dean, thank you so much. When voter turnout means everything, snow can really disrupt the caucuses. A blizzard is moving across the plains toward iowa this morning, making some candidates nervous. The latest poll of democrats shows Hillary Clinton with the 3point lead over Bernie Sanders. Nancy cordes is at a caucus site in des moines where caucusgoers nancy, good morning. Reporter good morning. Its hard for even iowans to believe the day is finally here. Take a look at the newspaper, caucus let your voice be heard. This is one of those places where the voices will be heard, in this middle school 6 to 800 voters will gather and try to convince each other to switch sides, making an already tight race even more unpredictable. We cant afford to make a mistake. Reporter look for redemption in a state she lost eight years ago, clinton boiled down her message to its essence. Stick with ideas that will actually work for our country. Reporter just like 2008, a onetime underdog is nipping at her heels. It sounds like you want to make a political revolution. [ cheers and applause ] heres a radical idea. Together were going to create an economy that works for all of us, not just for 1 . [ cheers and applause ] in this first column weve got age and gender. Im calling with the Hillary Clinton campaign. Reporter the campaigns have invested heavily in their get out the vote efforts. Were going to walk it three times before monday. Reporter the sanders team told cbs news 4,000 volunteers knocked on 112,000 doors this weekend. I will be caucusing tomorrow. For bernie . Yes. Excellent. Reporter a poll out this weekend found 83 of clinton supporters say their mind is made up, compared to 69 for sanders. Both of them pulled out all the stops this weekend to charm voters, even serenading their supporters. Me reporter former Maryland GovernorMartin Omalley is at 3 in the polls, and in a primary that would make him a nonfactor. But in a caucus, where neighbors can horse trade, they can switch allegiances halfway through, that 3 could make the difference, especially since clinton and sanders are separated by about 3 points, charlie. Thanks, nancy. Cbs news political director and face the nation moderator John Dickerson is in des moines. John, good morning. Good morning, charlie. What should we be looking at and what could be the consequences of iowa . On both republican and democratic side, were looking for turnout. If its bigot rep on the republican side, that means donald trump and ted cruzs supporters have come out to caucus. Bernie sanders has created an actual organization that can turn out voters to the caucuses. Those are the first two big things im looking for. What well learn tonight on the democratic side, well learn if Hillary Clintons structure, which shes been working on for months and months, before Bernie Sanders was a threat, she was building an organization here to handle a threat that he has become. And well find out if that organization beats the enthusiasm that hes been able to build. And on the republican side, well find out if ted cruz has been able to have an organization that can do better than the polls are showing. That will tell us not only about how well he can do here, but if he can launch the conservative revolution hes been saying hell launch. Donald trump told you yesterday, john, that he doesnt have to win iowa. A, does that surprise you, and do you think hes trying to lower expectations . Two things you do on caucus day here in iowa. One, you try and turn out your voters, and two, you try to manage expectations. Politician in that sense. He doesnt necessarily have to win in iowa. But it is the center of his argument, that hes a winner. And so that would be a big blow. But the one thing that would save him is theres not a clear alternative. Theres an alternative in iowa but its not necessarily the case that all republicans think ted cruz is the alternative to donald trump. And theres also the point that he says if he wins in iowa he might be able to run the table. Yes, he might be able to run the table, although, you know, things change after we get out of iowa. Well see how marco rubio does and whether he becomes the which is a much more favorable state for him. Thank you, john. Ahead, more of johns one on one interview with donald trump. And Hillary Clinton will be with us from des moines, well talk morning. International Health Officials today could declare emergency. The World Health Organization is meeting in geneva to discuss an there are at least 31 cases in the United States. All are related to recent travel outside this country. Reporter good morning. Brazil has been hardest hit by the zika virus. It may have arrived here in 2014 at the world cup soccer tournament and since then has exploded, infecting up to 1. 5 Million People in brazil alone. The fear is it could spread to another 4 Million People across months. Its become an all too common scene. Insecticide in the hopes of killing this, the mosquito aedes aegypti, responsible for the zika virus sweeping through latin america and the caribbean. The virus has been suspected of causing an increase in cases of microcephaly, children born with unusually small heads, often with brain damage. Of microcephaly have been reported so far in brazil, and pregnant women fear other side effects from the virus. The public doesnt know everything about the zika. We dont know exactly the consequence of the virus, only the microcephaly. Reporter tourism will also likely suffer, despite officials downplaying risks to visitors. Rios famed carnival festival begins on the 5th. Health workers took to the streets, armed with instruments and information. Events like this wrestling match are already under way and athletes are taking precaution, using bug spray and staying indoors. Kind of scary. Theres nothing you can do, if you get bit, you get bit. Reporter if the World Health Organization declares the virus a Public Health emergency, it will be only the fourth time the organization has done so, the company of h1n1 influence and ebola. John, thank you. John will take us into the center of the zika pandemic tonight. The acela express was traveling yesterday from washington to new york. Passengers reported hearing objects smack against the train in philadelphia. The train was on the same route as a deadly crash last year. Part of the federal investigation focused on whether an obstruct the train minutes before the accident. Parts of california are cleaning up this morning from a deadly winter storm. High winds ravaged the state. One driver in san diego was killed on sunday when a tree toppled onto her car. Ben tracy in los angeles shows us all the damage. Reporter high winds uprooted diego, killing a woman driving this honda. Three other cars were also damaged. Trees fell all across Southern California because the ground is soaked by recent storms and winds were howling at up to 70 Miles Per Hour. Gusts topped 115 Miles Per Hour in some areas and some trees stood no chance. I heard a pop, like slow motion, it was down. Reporter the winds also downed power lines, leading to widespread outages. Late sunday, 41,000 people still had no power. Ive lived here 15 years and never saw it blow so hard. Reporter a worker was trying to reduce the Wind Resistance when this tower collapsed. Thankfully he wasnt hurt. This car slid off an embankment. The driver walked away. I had my hand on the Steering Wheel and the roof of the vehicle and kind of went with the car as it rolled over. Reporter despite the damage, california desperately needs the rain. After four years of punishing drought, i willel nio fueled storms are taking us into spring. Cam newton and the Carolina Panthers looked stylish as they stepped off the plane in san jose on sunday after a crosscountry flight. The broncos landed a few hours earlier and buses carried Peyton Manning and their team to their hotel. Neither squad will have much downtime between now and sundays game. Players and coaches will meet with fans and media as part of super bowl opening night. Cbs is your home for super bowl 50. Coverage begins sunday with super bowl today at 11 00 p. M. And we interview president obama and the first lady live from the white house, just before the game. How about those cam newton pants . Im trying to get a pair for the president. I think theyll be a conversation starter. But i hear theyre tough to get. Do you think the president and first lady are ready for you . I dont know. I dont know. Were working on it, charlie. I know how hard those questions will be. Were working on it. Hillary clintons first loss to barack obama came in iowa eight years ago. Wellek very chilly and wet today. But northerly winds will set up as we start out february and well dry out quickly over the next day or so. But it will take a while to warm up. Highs just in the 40s for the next couple of days. Lets check the radar and see that we have rain and even some low elevation snow. We could see some flakes in higher areas around the valley for just a minute or two. Gusty winds with a wind advisory announcer this portion of cbs this morning sponsored by kay jewelers. Every kiss begins with kay. A College Track athlete accused of killing a 13yearold girl. Ahead, why Police Believe he had help in this murder. The news is back in the morning right here on cbs this morning. K here in the announcer this portion of cbs this morning sponsored by panera bread. Food as it should be. And warmth and looking good, and sandwich and soup and inside jokes, and dan is back good, clean food pairs well with anything. The clean pairings menu. 500 calories or less. At panera. Food as it should be. Cheers. Oh theres no reason to cry over spilled cabernet. All you need is some persil proclean. Oh thank you dont thank me. Thank the detergent. [laughs] im serious. Thank it. Persil proclean. Mastering irresistibly smooth. The lindor truffle. From the lindt master chocolatiers. A hard outer shell with a smooth center. Welcome to the best time of your day. Unwrap. 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