Look at todays eye opener. Your world in 90 seconds. The kind of criticism that we have heard from senator sanders about our president , i expect from republicans. That is a low blow. Democrats square off over president obama. Have you ever disagreed with a president . I suspect you may have. Senator dont listen to donald trump. Really. Negotiating a deal in another country is not Foreign Policy experience. We have a frontrunner candidate that disparaging women and hispanics. Pushes i do not believe he is a true conservative. These people are stupid the united states, russia and other world powers have reached an agreement on a cessation of hostilities in syrias civil war. Foyer people remain hospitalized this morning after a machete attack in an ohio restaurant. The suspect was fatally shot. Scientists say they found Gravitational Waves or ripples in the fabric of space time. The greatest signs of a before the accident of the breakthrough of the century. Lets take a listen. Hello the top half of the country in the northern states is affected. Pope begins a seven day visit to latin america. Finish preparations going on in mexico city. All that. That is donald trump signing a baby. Look at these people. I also love going on red carpets and doing very cool poses. Give me your blue steel. And all that matters. Charlie rose received a big honor for excellence in broadcast journalism. You do not want to be on television as long as i have because you can see yourself aging in front of your eyes. On cbs this morning. This sunday is valentines day. I dont always know what to do on valentines day any more. The day women all around the the new ways their husbands and boyfriends will disappoint them announcer this portion of cbs this morning sponsored by toyota. Lets go places. Welcome to cbs this morning. The democratic president ial race is getting tighter. Hillary clinton and Bernie Sanders found more issues to fight about at last nights debate. This was their last showdown before the nevada caucuses and South Carolina primary. The candidates reached out to minority voters who are about to play a much larger role in the campaign. Nancy cordes is at the university of wisconsinmilwaukee where she covered last nights debate. Reporter good morning. Everyone was wondering if Hillary Clinton would retool her message after her big loss in New Hampshire and the answer is she did she embraced parts of the sanders world view and she acknowledged that the economy is rigged in favor of the 1 . But she also went into detail about why she thinks that his very ambitious plans to fix it wont work. Candidate and i do not believe we live in a singleissue country. Reporter clinton and sanders clashed over health care, wall street donations, and their loyalty to the president. And many people will actually be worse off than they are right now. Final thought, senator . I think that is inkrak accurate inact accurate. Calling the president weak and a disappointment. Have you ever disagreed with a president . I suspect you may have. One of us ran against barack obama. I was not that candidate. Reporter the debate was in wisconsin but the candidates were clearly focused on the next primary in South Carolina, where africanamericans could decide the outcome. So Race Relations would be better under a sanders presidency than they have been . Absolutely. Because what we will do is say instead of giving tax breaks to billionaires, we are going to create millions of jobs for low hanging out on street corners. Reporter clinton argued she would be the best heir to the legacy of the nations first black president. The kind of criticism that we have heard from senator sanders about our president , i expect from republicans and i could not expect from someone running for the democratic to succeed the president of the united states. Madam secretary, that was a low blow. Reporter i think once im in the white house, we will have enough Political Capital to be able to do that. Secretary clinton, youre not in the white house yet. Reporter that exchange reminded a lot of people of that Famous Exchange from 2008 when barack obama told Hillary Clinton she was, quote, likeable enough. Clinton was asked last night, gayle, why she lost among women she said her goal was to empower women to make their own choices, even if that choice was to vote for somebody else. Thank you very much, nancy. The republican candidates will meet tomorrow night in South Carolina for a cbs news debate. Most of them are already in that key state criticizing each other. And pitching voters who will go to the polls a week from tomorrow. But donald trump was hundreds of miles away last night and he was speaking to about 10,000 fans at a rally in baton rouge, louisiana. Julianna goldman is outside of the peace center in greenville, sooted saturdays debate. Here and republican candidates are certainly upping the ante ahead of tomorrows gebt debate. Donald trump was in louisiana squarely on South Carolina. Great place. South carolina. I think we will do very well. Reporter from the campaign trail to the airways south fiveman slug fest. Dont listen to donald trump. Dont listen to donald trump. Jeb bush has no Foreign Policy experience, period. Time being negative. How do you think donald trump anything . Bush says, i believe he is not a true conservative. These people are stupid reporter its donald trump target. I just hope you doobleg the nt believe okay . They are lies reporter trump taking time to sign a baby at his baton rouge rally struck a softer tone yesterday and criticized an ad pulled by ted cruz. Cruz wasnt feeling the love. Rolling out this minutelong ad here. Yes, its donald trump. Its you and your cronies and government. Reporter antitrump superpac is distributing what they call a voters guide and switching Political Parties and ask can we trust donald trump to stand issues . Its bare knuckle politics and been that way a long time. Reporter chip is in South Carolina where a local paper has set up a website to track underhanded tactics. This is for the long haul and if you come out of this primary and youre doing well, you can you can handle it on the national stage. That is part of it. Its a testing ground. Reporter so far at these debates, jeb bush has been the no aggressive on taking on trump. That is expected to change tomorrow night. Charlie, bush is also bringing in reinforcements his brother, former president george w. Bush will campaign with him on monday. We have inside the peace center, John Dickerson, a moderator for tomorrow nights debate and kim strasle will be one of the pannists. Good morning. Reporter let me gib with the republicans and talk about the fights in the gop taking place now in South Carolina. Go ahead. Well, thats right. So youve got cruz versus trump. Then youve got the battle to be the alternative to cruz and trump. That is at least two fights. And then those who are fighting to be the alternative hope to take on trump or cruz. Its basically three fights and its ranging all over the place on issues from veterans to values. There is some talk of who has better christian values and then, of course, there is the competency question, who has the experience, who has been tested and who can handle the presidency once they get there. We keep hearing that george bush is hitting the road for his brother. Is that an asset or liability for him, do you think, in South Carolina . Well, South Carolina is a place george w. Bush came back and in 2000 against john mccain and a lot of history here and a bit of organization here. Also the veterans here. There is a connection between him as a wartime leader. And also just the good feeling about the bush family. For the kind of voters that jeb bush is trying to turn out, its a good thing. He was even bragging hes a member of the establishment because of his brother and his not something any candidate is doing this season. What impact has the previous debate and the New Hampshire results had on the numbers in South Carolina . Right now, trump looks like he is still way up and way ahead. Its a little still a little early for that impact to be fully known. But at least in one survey i looked at this morning, and you know how these things are quite volatile, he is still way up. Kim, what are you looking for . Well, i think down here, this is going to be a very different race than it has been in iowa or New Hampshire, because South Carolina is just a little bit more of a varied state. So there is a lot of talk down here because its a manufacturing state about jobs and the economy to a degree. You probably dont have in iowa or New Hampshire. I think as john referenced, there is a big veteran and active duty military presence here. So Foreign Policy is going to play a big role, a bigger role than it has in the past. But, also, those values voters are back in a place after New Hampshire where that is, again, a very big focus and you hear the candidates going at it. But this debate will be slightly up in this now. These are postdebate questions. Postdebate from New Hampshire and postresults from New Hampshire. What about marco rubio . Has he been slowed down significantly . I think he is certainly been he admitted it. And look as though he is nimble on his feet. Be able to ask answer questions and not sound formlaic. He has come out more aggressive down here and hitting at his competitors more harder, particularly trump. I think youre seeing all of these guys had held back their fire on trump and gone after emp each other a lot but now training their guns on the top guy and he has a lot of incoming. Thank you, John Dickerson and kim strassel. John dickerson and Major Garrett will question the candidates at tomorrow nights debate and starts on cbs at 9 00 eastern and 8 00 central. Then on face the nation john interviews donald trump and marco rubio here on cbs. Details this morning about the temporary ceasefire. John kerry says the pause in fighting the next week. The deal will allow food and humanitarian aid will reach to be reached. Margaret brennan has been told the deliveries could begin as early as today. Holly, good morning. Reporter this is the first ceasefire agreed on by all of the countries involved in the Syrian Civil War but its success is still doubtful, because the russians say they will continue their air strikes against terrorist groups, which they targeting americanbacked rebels. Meanwhile, isis and other extremist groups are not a part of this agreement. Syrian civilians are, once again, paying with their blood, as the regime claws back territory from rebel fighters. Supported by russian air power. Russian air strikes, which only started in september, seem to have tipped the balance in syrias fiveyearlong civil war giving the regime the upper hand. This week, Regime Forces launched an assault on the town of tall rifat which had been a stronghold for the rebels, some of them armed by the u. S. We met abdul balul who runs a school in telerefat. The shelling and air strikes are random, he told us. Homes are destroyed and on the ground. Syrian Regime Forces with help from their ally, iran, have also nearly enincluded aleppo. Syrias biggest city before this war began. If the ceasefire plan doesnt succeed, 300,000 civilians could be cut off there as they were in the town of madia, under a siege by the regime. More than 40 people there have starved to death. Tens of thousands of syrians have fled the new offensive and tried to cross this border into the safety of turkey. But turkey already has more than 2 million syrian refuges and is reluctant to take any more. Holly williams along the turkish syria border, thanks. The u. S. Government is growing concerned that isis is we have a number of of incidences isil has used chemical munitions on the battlefield. Reporter artillery shells . Sure. Reporter isis has access to chemical artillery shells . There are reports that isis has access to chemical precursors am nirks that they can use. Reporter the cia believes that isis has the ability to manufacture small quantities of chlorine and mustard gas. And the capability of exporting those chemicals to the west . I think there is always a potential for that and why its so important to cut off the various transportation routes and smuggling routes that they have used. Reporter are there American Assets on the ground right now hunting this down . The u. S. Intelligence is actively involved and being a part of the effort to destroy isil and get as much insight into what they have on the ground inside of syria and iraq. More of scotts interview the cia director tells scott about homeland security, cyberattacks and how the u. S. Is dealing with rogue States Sunday on cbs. Sources tell cbs news that federal investigators are looking into a brutal rampage in ohio had any connection with radical groups. Police say a man with a machete attacked several customers inside a columbus restaurant last night. The man was shot after a chase from the police. Reporter cbs news has learned that investigators have identified the suspected attacker as mohammed barry. Investigators are reasoning down leads this morning, trying to determine if the attack is somehow tied to terrorist organizations. He came to each table and just started hitting them. Reporter witnesses describe the bloody scene at the middle Eastern Restaurant nazareth in columbus, ohio, last night. A man armed with a machete tabletotable striking diners. This was a brutal attack. The man walks in to people that are just there having dinner and starts attacking them. Reporter karen bass was there. There were tables and chairs overturned. There was a man on the floor bleeding. There were there was blood on the floor. There were it was awful. It was just carnage. Reporter police say the suspect visited the restaurant and talked with an employee earlier in the day. Police say its not clear what the discussion was about. Investigators say less than an hour later, he came back and the second time, nothing was said. He just simply came in and started the attack. Reporter four people were taken to the hospital. One person in Critical Condition is expected to survive. The suspect fled and after a fivemile car chase, investigators say he got out of his vehicle, armed with a he lunged across the hood at the officers. Another officer and a cruiser fired a couple of shots at him and put him down. Reporter the suspected attacker has a somali background and officials believe he may have traveled internationally to dubai in 2012 and still early on in this investigation, but this morning, Law Enforcement is concerned that this incident has the hallmarks of the type of lone wolf terrorist attack that they have been working to stop. Scary, indeed. Thank you, jeff. There was a major scare aboard an americanairlines jet headed to phoenix. American flight 564 was forced to make an Emergency Landing yesterday at Los Angeles International airport. American says the smoke was caused by a hydraulic fluid leak. Eight passengers and crew were checked by paramedics but no one was taken to the hospital. Millions in the east are bracing for the coldest weekend of the winter. Its already cold enough that a massive water main break in scranton, pennsylvania, quickly covered the road and the surrounding homes and the trees with a sheet of ice. Polar vortex will make temperatures plunge up to 30 degrees below normal. Many low temperatures across the east today are in the teens. Tomorrow, they say will be even colder with lows expected to be zero. So those of you who have pets at the table, you need to put on their booties and their coats, charlie . You too. Would you like to come over and take a cold walk tomorrow . No. Youre so good at it, ill leave it up to you. Donald trump is taking on america. Announcer this portion of cbs this morning sponsored by kay jewelers. Do female surfers stack up to the men in the sport . Ahead, the controversy sweeping through a massive surf competition. The news is back this morning right here on cbs this morning. 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