Pelley president obama interrupted preparations for tonights state of the Union Address to deal with a breaking development in the persian gulf. Iran seized two small u. S. Navy boats and took 10 crew members into custody. Cbs News National security correspondent david martin is following the story at the pentagon. Reporter the two small boats were on route from kuwait to bahrain but ended up on irans farsi island in the persian gulf. U. S. Officials believe the boats and the 10 sailors aboard were picked up after they had suffered a mechanical breakdown and drifted into iranian territorial waters. Officials do not know if shots were fired, but say irans foreign minister has personally assured secretary of state kerry the sailors will be allowed to continue their journey. It would seem a harmless incident, except that two weeks ago, Iranian Revolutionary guard ships fired off rockets within a carrier truman. The rockets were aimed the other in the middle of crowded shipping lanes drew a strong protest from the u. S. Scott, u. S. Officials expect the sailors will be allowed to continue their journey as soon as it is daylight in the persian gulf. Pelley david martin reporting at the pentagon. Dade, thank you. Tonight, cbs news has confirmed that 10 yemenis held at guatanamo bay will be transferred to middle Eastern Countries willing to take them. With that the population at the u. S. Detention camp for terror suspects will fall below 100 for the first time. President obama had vowed to close guantanamo in his first address to congrgrs in 2009 but congress so far has blocked him. In just a short while, we will hear the final state of the Union Address from the 44th president , but first, the battle to become the 45th. A new cbs News New York times poll out moments ago shows the democratic race tightening. Last month, Hillary Clinton had a 20point lead nationally over bernie sanders. Tonight, sanders has cut clintons lead to seven. The senator from vermont talked to our nancy cordes. Reporter for senator sanders, every poll that came out today was better than the last. A New Hampshire poll showed him widening his lead over clinton 53 to 39. An iowa poll showed him pulling ahead of her there by five points, a 16point swing in one month. Do you now consider yourself the frontrunner, at least in those two states . Im feeling better and better that we can win both states. You know, when we began in iowa, i think the first poll had us at 2 , 2 . Reporter his reversal of fortune forced clinton to step up her attacks in ames, iowa today, where she called his medicare for all plan impractical, even risky. If thats the kind of revolution hes talking about, i am worried, folks chelsea, carried the message to New Hampshire. Senator sanders wants to dismantle obamacare. It is an indication that the Clinton Campaign is getting very, very nervous. Reporter even if you win in iowa and in New Hampshire, how do you compete in south carolina, in florida, states where Hillary Clinton has a huge organization and a huge head start in the polls . Gee, nancy, thats the thats the question that was asked to me eight and a half months ago about iowa and New Hampshire. Well, things have changed. Things will change in nevada. Things will change in south carolina. Reporter but theyre going to have to change not in eight and a half months. I know, we have good ground organizations as well. Reporter clinton argues this is the natural tightening you see at the end of any race, but even sanders admitted to us, scott, that hes resinating, even more than he ever expected. Pelley nancy cordes with the key interview tonight. Nancy, thank you. On the republican side, our leading his closest rival, ted cruz, nearly two to one. Marco rubio is the only other candidacy in double digits. Heres Major Garrett. Did he not get e memo live free or die . Reporter truz, deadlocked with drusm for first in iowa, turned to New Hampshire for the first time in two months and again tried to dispel trumpplanted questions about his birth in canada and legal status for the white house. The legal question is quite straightforward. Which is that the children of u. S. Citizens born abroad are natural born citizens, citizens by birth. Reporter but one of cruzs law prefers lawrence tribe wrote the constitutional def nifgz a natural born saturday is completely unsettled. John mccain confronted similar questions as the g. O. P. Nominee in 2008. Mccain was born on a u. S. Military base in panama. I am very confident that ted to run for president , but it needs it needs to be looked into. Reporter what do you think trump, and to a lesser extent, ted cruz have tapped i io within the republican conversation . Anger, frustration. Reporter does donald trump to, your way of thinking, represent the party of Abraham Lincoln and Ronald Reagan . I think he wants to. I disagree with him on a number of the statements andpositions that he has taken, obviously, but if thats the verdict of the Republican Party and the marity of americans, then i will do everything i can to help that president. Reporter mccain supported Lindsey Graham and told us now is not the time to endorse any other republican. He said he will endorse the partys nominee no matter who it is because Party Loyalty will not allow him to walk away. Pelley Major Garrett in the washington room of newsroom. Major, thank you. Now to the president s seventh house got a look at it. Margaret, whats in it . Reporter well, scott, president obama will strike a very optimistic tone in his speech tonight aimed at burnishing his track record and pushing back against what white house aides describe as an avalanche of negativity from republicans. We got a look at some of the cerpts just released from the white house, and we it tell you that the president will say that the future we want opportunity and security for our families a rising standard of living and a sustainable, peaceful planet for our kids all of that is within our reach, but it will only happen if we all work together. It will only happen if we can have rational, constructive debates. It will only happen if we fix our politics. With just over a year before the next president takes office, mr. Obama will use his last state of the Union Address to enhance his legacy. Hell take credit for the high of 10 to 5 today. And hell tout the more than 17 million previously uninsured americans who now have Health Insurance because of obamacare. The president will also mention the nuclear deal with irr a the International Agreement on climate change. But the speech will not include a legislative todo list. The president knows hes unlikely to get the Republicancontrolled Congress to support one. Instead, hell argue that his successor should continue the work he started. But in a new cbs News New York times poll, most americans, 65 , say the country is on the wrong track. Just 45 approve of the president s work on the economy. 34 of his foreign policy. And the war against isis is a sore spot. 67 think the fight is going badly. House Speaker Paul Ryan 46 Million People are still living in poverty today, among the highest poverty rates in a generation. This is not the signs of a recovery. You combine that with the fact that the world is on fire, that from us, that we are less safe, and that is why the anxiety in america is so palpable. Reporter tomorrow, the president will travel to louisiana and nebraska to personally deliver that message. Pelley Margaret Brennan at the white house tonight. And d hope you will join us right here for live coverage of the state of the Union Address and the republican response. That begins at 9 00 eastern time, 8 00 central, 6 00 in the west. In other news tonight, in turkey today, a suicide bomber blew himself up in a section of istanbul that is most often packed with foreign tourists. At least 10 people were killed, 15 wounded. Turkeys government blames isis, but not everyone is convinced. Holly williams is there. Reporter the deadly explosion targeted istanbuls historic heart, just yards from at least e eht of those who lost their lives were german tourists. This image captures moment of the blast. Jostein nielsen from norway was hit by shrapnel from the bomb. Wife, magna. Our clothes, my jacket, was splattered with burnt human remains. The turkish government blamed a syrian suicide bomber and said he was a member of isis. But so far the terrorist group, which normally celebrates its atrocities, has not taken responsibility. This attack comes just three months after two suicide bombers targeted a peace rally in the turkish capital ankara. More than 100 people were killed in the deadliest terror attack in turkeys modern history. Turkeys a member of the u. S. Led coalition against isis and has tightened its border of militants to syria. But turkeys also engaged in a violent conflict with militants from the countrys kurdish minorityfter a ceasefire collapse last year. Some here in turkey believe this spate of deadly attackshows that syrias civil war is spilling across the borr. But, scott, others blame the turkish government because of its ongoing clashes with the countrys kurdish militants. Pelley Holly Williams in istanbul tonight. Holly, thank you. Today, mexican authorities released a new video of the capture of the drug kingpin known as el chapo. He was caught friday, six months after escaping from prison. The video shows how he nearly got away again. Manuel bojorquez is in mexico. Reporter when the Mexican Marines first raided this hows, there was no sign of the instead, inside a maze of dark rooms captured on helmut cameras, the marines found a group of Cartel Members who pleaded for their lives, guns strewn a aross the floor. Upstairs, a stack of dvds featured kate del castillo, the mexican actress who raemged the Rolling Stone interview with Actor Sean Penn and then they found this a light chain inside a clos theatunlocked an unusual panld behind this mirror revealing hidden door and el chapos escape route, and program managed to get away. El chapo made it several blocks underground to the citys storm sewers before he was finally arrested. The government said it had been watching the house for weeks after a Cartel Member known for his tunnelmaking expertise was spotted anything inside. Today, el chapo is locked up here at the same prison he escaped from six months ago awaiting possible extradition to but former Mexican Foreign minister Jorge Castaneda cautioned that capturing el chapo wont make a dent inhe drug business. There is absolutely no reason to believe that less drugs, all in all are, entering the United States from mexico than before. Reporter so el chapo being in prison doesnt change any of that operation . I dont think so. Reporter here at the prison, federal police have beefed up security. Guzmans oldest son sbled to be lling his fathers role in the cartel now, and, scott, a twitter message claiming to be from Yvonne Guzman vowed revenge for his fathers arrest. Pelley winter was awfully slow to arrive in the northeast, but now its come in with a vengeance. Driving was nearly impossible today south of buffalo, ne york. Two feet of snow since yesterday. In eastern indiana, have look mangled trucks scattered all over i70. They crashed in blizzard its not just cold descending from the north. Canadians arecanadians are streaming over the border to buy powerball tickets. Today, the jackpot for tomorrow nights drawing grew to at least 1. 5 billion. More than 19 million worth of tickets are being sold every hour. Well, you cant put a price on clean water in one city where the supplies are tainted with lead. That story when t cbs evening news continues. Song thats life song thats life song thats life thats lif you diet. You exercise. And if you still need help lowering your blood sugar. This is jardiance. Jardiance works around the clock to lower blood sugar in adults with type 2 diabetes. It works by helping your body to get rid of some of the sugar it doesnt need through urination. This can help you lower blood sugar and a1c. And although its not for weight loss or lowering systolic blood pressure, jardiance could help with both. Jardiance can cause serious side effects including dehydration. 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If a dentureere to be put under a microscope, we can see all the bacteria that still exists. Polidents unique micro clean formula works in just 3 minutes, killing 99. 99 of odor causing bacteria. For a cleaner, fresher, brighter denture every day. Pelley families in flint, michigan, finally saw clean water delivered door to coor today. Their tap water has been tainted with lead nearly two years after the city began drawing draug from the flint river to save money. The number of children with high lead levels in their blood has doubled. Adriana diaz is in flint. Long time for this water. Reporter today, volunteers and state troopers hand out bottled water and filters, a week after michigan Governor Rick Snyder declared a state of emergency for the city. Pretty streful. I mean, you gotta go and pay your water bills and then go and buy water, too. Reporter it was back in the october that the Drinking Water in flint was declared unsafe, but recently unearthed emails suggest that state officials you knew about the lead problem as far back as july. Thats when an internal state Health Study Found high lead levels in flint children after the 2014 water switch. But residents werent told there was a problem until two months later and continued to drink the contaminated water. Governor snyder came to flint yeerday. I have apologized for whats gone on with the state, and i am responsible for state government. Reporter flint resident Gladys Williams said the governors words ringed hollow. Were the walking dead. Thrown upon us yet. Reporter Elena RichardsonElena Richardson worries about her kids. Their pediatrician told her the contaminated Drinking Water may be whats behind their skin rashes and mouth sores, known indicators of lead poisong. Its sad and frustrate because it seems like nobody cares. Reporter why do you think nobody cares . Because theres a highcrime rate here, and there are more poor african americans. You know, snyder dont care. He dont stay here. Reporter today, the Governors Office told us that state experts originally concluded that higher lead levels were simply seasasal. It wasnt until october 1 that the governor says he learned there was confirmed lead in the water. Still, scott, the federal justice deps is launching an investigation. Pelley joe biden reveals a scrept offer from the president when we come back. Er. After one week of chantix, i knew i could quit. Along with support, Chantix Varenicline is proven to help people quit smoking. Chantix reduced my urge to smoke. Some people had changes in behavior, thinking or mood, hostility, agitation, depressed mood and suicidal thoughts or actions while taking or after stopping chantix. Some had seizures while taking chantix. If you have any of these, stop chantix and call your doctor right away. 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