The democratic side, even tighter. Hillary clinton ahead of Bernie Sanders by just 3 . A dead heat within the margin of error. Although not everything is rosy for the frontrunners, gallups most weekly biweekly unfavorability average shows three out of every five americans, 60 , view trump unfavorably. Thats the highest negative rating for a president ial candidate since at least 1992. While Hillary Clinton currently has the third highest, 52 of americans have a negative view of the former secretary of state. People dont like them, but theyre supporting them. On the plus side clinton did get a huge endorsement over the weekend from the new york times, which called the former secretary of state, quote, one of the most broadly and deeply qualified president ial candidates in modern history. The paper also endorsed john kasich, saying even though hes an underdog, hes, quote, the only plausible choice for republicans. Clinton continued her push late last night making a rare appearance on stage with her husband bill and daughter chelsea. Both of whom normally stump separately while Bernie Sanders continues to garner support with younger voters, and hes raising a lot of money. The Campaign Announced it raised 20 million in january alone. It says it will have enough funds to stay in the race for the long haul. This as both campaigns tell nbc news they expect today to be close. Nbcs Kristen Welker is in iowa with more. Its the home stretch. Hillary clinton and Bernie Sanders blanketing iowa. A fight for the number one spot in a race likely to be a photo finish. Monday night could be an historic night for this country. We can make history. Lets start a storm of Movement Toward the future that we want to make together with just hours before voters caucus, clinton and sanders, in a statistical dead heat. 45 to 42 in the final iowa polling. Getting people out to vote is todays top priority. Teams of volunteers and organizers knocking on doors one last time. Making sure every supporter knows two things, where their caucus location is, and how theyll get there. And the Clinton Campaign allowing nbc an exclusive look at their specially developed app, which is like a caucus night calculator, helping them keep close tabs on caucusgoers and how theyre voting. Allows us to streamline the process and help our precinct captains be able to move more quickly through some of these processes so theyre spending less time calculating and more time persuading. The Clinton Campaign estimates 125,000 door knocks this weekend alone, 4200 trained precinct captains and team members in place. Sanders ground team equally impressive. 76,000 door knocks, over 15,000 volunteers. Clinton, still playing defense on her private emails when she was secretary of state. I just have to point out that the timing and some of the leaks that have led up to it are concerning. Sanders, whos been reluctant to engage in the email issue, weighed in on meet the press. Know, i think this is a serious issue. I am not going to attack Hillary Clinton, the American People will have to make that judgment. And with the clock ticking, voters are now ready to have their say. Who are you supporting . Bernie sanders. Why Hillary Clinton . I i honestly think that she has the most experience, and she can do the job. That was nbcs Kristen Welker reporting. And make sure to tune in this thursday for the New Hampshire democratic debate airing right here on msnbc. Clinton, sanders, and Martin Omalley all expected to attend. With polling tight, donald trump and ted cruz continue to escalate their attacks on one another as both candidates attended church in a last effort to court those voters. Nbcs Hallie Jackson reports. In the final crunch before the caucuses, even Church Becomes a campaign stop. I pray that gods will be done. Reporter but this sundays signs of peace giving way to the battle on the campaign trail. Donald trump exports expanding obamacare to make it fullon socialized medicine like Bernie Sanders. Look, ted cruz is a total liar. I am so against obamacare. Im going to repeal and replace obamacare. Reporter trump, looking strong, still subtly starting to tamp down expectations, arguing he doesnt have to win this state. Id like to win iowa. Im doing really well with the evangelicals, and in iowa. Reporter both candidates know support from christian conservatives could be the deciding factor. About 6 in 10 caucusgoers identified as evangelical the last couple of cycles. If the same number turns out new polling shows this race will be a dead heat. Whats going to be important for you in that caucus room . I think whats most important to me when i go do a caucus, i want somebody who obviously shares the same values that i have. As a as a christian, as a bible believer. Reporter pastors at New Hope Church clear on what they want from a nominee, and what they dont. Im disappointed that people will tell us when they get to washington theyre going to do this. Im disappointed that the republicans and democrats cant Work Together to make better laws that that reach across the aisle, and that benefit all americans. Reporter that frustration, one of the biggest factors fuelling outsiders like trump and cruz here. Very frustrated with both parties. Although i have faith in marco. Reporter thats gary warm bier at A Marco Rubio rally. Rubio, cruz and trump all ready for a race that could last long past iowa. The real poll that matters is tomorrow night. The poll matters, its what we actually do right, and not necessarily what all the media tells us to do. 33 thats right. That was nbcs Hallie Jackson reporting. Late yesterday we got one more memorable moment. The Ted Cruz Campaign bus got stuck in the mud and had to be towed. You know that theyre hoping that is not a metaphor thats going to come true. Bernie sanders meanwhile remaining confident hell win if turnout is high. Campaign insiders say that if more than 200,000 people show up like they did in 2008 sanders will win. But, all the confidence in the world, of course, cant stop the weather, and theres a storm coming to iowa. Nbc meteorologist bill karins is here with more. Is it going to stop the caucusgoers from going out . It does not look like it will. Its a close call, though. I mean we were about twelve hours away from dealing with a caucus blizzard. But as far as the forecast goes for tonight, 7 00 p. M. The doors will be shut, the temperatures will be in the 30s. Some rain will be breaking out here in areas of nebraska and iowa. But it does not look like were going to have any problems with the snow. Even by 10 00 p. M. When it wraps up and everyone is heading home, temperatures still warm. There is snow breaking out in nebraska. Theres a chance along the nebraska iowa border for a little bit of snow. But with temperatures in the 30s i think the roads will be just fine. Wont be until tomorrow that well start to see more of the additional problems. Heres the snow tonight at 10 00 p. M. , avoiding iowa which is good. The storm is now currently in areas of california, heading through arizona, weve even had thunder snow in northern ariz a arizona. Winter storm warnings from areas of california, right through southern utah, all of colorado, and now we got some blizzard warnings that are now changing into areas in iowa, too. Again this is going to be late tonight into early portions of tomorrow morning. And the forecast snow totals, this is impressive snowstorm. Areas from like omaha, ames, iowa, just south of minneapolis through rochester will have 6 to 12 inches of snow out of this and the heaviest of it being here in nebraska, and our friends in denver today dealing with 6 to 10 inches of snow, too. So this is an allout storm. We were very close to the iowa caucus blizzard. Instead it will be the groundhog day blizzard. Dont miss a second of our iowa caucus coverage hosted by richal maddow, Brian Williams and Chris Matthews tonight at 6 00 p. M. Eastern here on msnbc. Lets get down to business with cnbcs landon dowdy. Good morning, landon. Hi, gigi. Good monday morning to you. The markets could set off february on a down note. Stocks ending higher on friday but still closed out the worst january for the dow and s p 500 since 2009. And the nasdaq since 2008. Today personal income and Consumer Spending and earnings from googles Parent Company alphabet. Meanwhile the cdc is reportedly expected to declare an end to chipotles e. Coli outbreak as soon as today. The wall street journal says investigators still havent pin pointed the cause of the contamination that affected people in nine states and impacted chipotle sales and stock price. The chain is planning an ad and social Media Campaign to woo back customers. And elon musk gets set to test his high speed, hyperloop Transit System this summer. A team of students at m. I. T. Won a competition by designing a vehicle for the test track. The hyperloop could transport passengers at speeds of up to 760 miles per hour. Gigi, back over to you. Is that close to the speed of light, landon . They dont call them the real life iron man for nothing now sports are coming up, super bowl 50 less than a week away. The competing teams are vying for the lombardi trophy. Theyve touched down in california. The nfc champion Carolina Panthers arrived in san jose theyre looking to capture their first super bowl title in franchise history. The panthers rolled through the regular season with a 151 record before knocking off the seahawks and cardinals to advance to the big game. The afc challenger Denver Broncos flew a broncos flag from the team plane upon their arrival in san jose. Its the broncos second super bowl appearance in three years as the team looks to capture their first championship since 98. Meanwhile some of the nfls best took part in the pro bowl in hawaii. The teams were coached by hall of famers jerry rice and michael irvin. Eli manning hooked up with Kansas City Chiefs tight end travis tell ki for a tour for team rice. Russell wilson threw for 164 yards, three touchdowns all in the first half. Wilson earned offensive most valuable player honors leading team irvin to the 4929 victory. Detroit lions star wide receiver Calvin Johnson is hanging it up after nine seasons retiring from the nfl. Johnson reportedly told his family and friends before the 2015 season that it would be his last. Drafted second overall in the 2007 draft out of georgia tech johnson went on to become the lions alltime leader in receptions, and receiving yards. Just ahead, two Virginia Tech students arrested in connection with a shocking murder. Plus, this morning you may be asking yourself, what exactly is a caucus . Well, we have got the very specific answer coming up next you dont want to miss it. Melodic, calm music. We said goodbye the day. And to the city. And drifted off into the twilight. Melodic, calm music. And when we woke, we found that the whole world had reinvented itself. Sail with princess cruises, the best cruise line in europe. Limited mediterranean balcony fares from 1,399. Call your travel consultant or 1800princess. Princess cruises. Come back new. More sit per roll. More stay per roll. More whos training who per roll. Bounty is two times more absorbent. So one roll of bounty can last longer than those bargain brands. So you get more life per roll. Bounty. The longlasting quicker picker upper. And try bounty napkins. This is so disturbing. Two Virginia Tech students have been arrested in connection with the abduction and murder of a 13yearold girl. Nicole lovell. Her body was found saturday along a North Carolina highway. David eisenhauer, who police say knew the victim, is charged with first degree murder and kidnapping. Natalie keepers is charged with improper disposal of a body. Eisenhauer will be arraigned today. And today the Worlds Health organization is holding an emergency meeting to find ways to fight that explosive spread of the zika virus which is linked to birth defects. Just ahead, msnbcs Jacob Soberoff goes in search for answers to the ageold question, what is a caucus, just in case youve been pretending you knew all along. The microsoft cloud allows us to scale up. Microsoft cloud changes our world dramatically. It wasnt too long ago it would take two weeks to sequence and analyze a genome. Now, we can do a hundred per day. With the microsoft cloud we dont have to build server rooms. We have instant scale. The microsoft cloud is helping us to rebuild and reinterpret our business. This cloud helps transform business. 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If you want to save fifteen percent or more on car insurance, you switch to geico. Its what you do. Where are you . Its very loud there. Are you taking a zumba class . We are just hours away from todays iowa caucuses. Something candidates spend millions of dollars and hours trying trying to win. But what exactly is a caucus . Dont be embarrassed if you find it confusing. Mbss ins Jacob Soberoff headed to iowa to find out that it can even be confusing for native iowans. Listen. Reporter a caucus is, lets just say it, kind of a strange way to pick a president. Iowa isnt the only state to use some form of the caucus system but it goes first. What is a caucus, exactly . What is a caucus . Well its when they try to get out there and get get all of the you know, to figure out whos going to be the best candidate. It helps decide i dont really know, to be honest. Reporter on iowas caucus day, election day is more like election hour. At 7 00 p. M. , whether its at a school, legion hall, church, government building, or another location, you have to show up, in person, at one of 1,681 precincts to participate. Explain to me how do you caucus . You go to the area in your precinct, and then from there you decide which candidate youre going to caucus for. You kind of go and stand by who you want to support. Reporter you kind of go and stand by who you want to support. The group. Reporter because Political Parties control the primary process what you do once youre inside the caucus depends on whether youre a republican or a democrat. The Republican Caucus process is pretty straightforward. You walk in, you write the name of your candidate on a piece of paper, you hand it in ballots are counted a winner is announced and delegates are awarded. If youre a democrat caucusing is sort of a game of musical chairs. Theres a public pitch to everyone who shows up by a Campaign Representative for each candidate. Then caucusgoers literally break into groups for their candidate, or to an area for undecided voters. The percentage each candidate gets is calculated, and a candidates support is deemed viable if in the vast majority of caucus locations they get 15 support or more. Caucusgoers whose candidate doesnt make the cut can realign to another campaign, try to reach viability by recruiting additional supporters or go to the undecided category and be recruited from there. The process repeats until all remaining candidates are viable. Then delegates are awarded. Confused . Youre not alone. And its why some say the turnout for the iowa caucus has historically been so low. Are you going to caucus, pat . No. Are you going to caucus . Its probably going to depend on the weather. Are you going to caucus . Absolutely not. Isnt that weird they just stand around in groups . Jacob, thanks for cleaning that up for us. Lets bring in political reporter lauren french. Good morning, lauren. Good morning. So this race is tighter than ever. Big question right now in iowa is how meaningful are all of these polls . Could we maybe see some real surprises if voters dont come out to caucus in high numbers . Thats a real question for today. These polls have put donald trump in the lead for months. And the big question is how accurate will they be . Because, trump supporters, and trump voters could be outside of the realm of people who do go to the caucus. You saw in that video a lot of people saying they werent planning on going to the caucus but could have been counted for trump in these polls. So youre going to see how accurate they are. And whether or not polling in iowa can really predict who will ultimately caucus. You have Bernie Sanders on the democratic side playing videos at his before his rallies telling rotors how to caucus and how to go to their caucus because there is deep concern in both camps that these voters, some of these unlikely caucusgoers just wont show up and youre going to s