Twitter is now being dubbed the pulse of the planet. 320 million active users turning to it every day. But the anniversary doesnt come without problems. This morning, the man behind it, jack dorsey, opens up about its past, present and future. Cinderella stories. Upsets ruled day one of the ncaa tournament. For the yale bulldogs. How smart is your bracket looking today, friday, march 18th, 2016 . Announcer from nbc news, this is today with matt lauer and savannah guthrie, live from studio 1a in rockefeller plaza. Good morning, everyone. Welcome to today on a friday morning. Remember the godfather and the line, you broke my heart . My version is, seaten ton hall, you my letter grade is an f minus. You had one big bad pick. Go wildcats, next year. Well talk about the tournament in a while. Top story, so much for spring. It officially arrives on sunday but its not going to feel that way, especially on the east coast. Temperature about to plunge and the storm is brewing. This could bury parts of the region in snow. Al, you broke my heart. Just when i thought i was out, i pull you back . Exactly. Whats going on . Heres the deal, were watching this low pressure system koll coming from the southeast. Severe weather saturday morning there. By the afternoon, its raining in washington, d. C. And cold filters in. A rain snow mix will start for washington, d. C. Saturday evening. Snow showers sunday morning for new york city. We have the american model and the european model. Theyre fairly close early on. As we get to sunday afternoon, sunday morning, you can see they the european model is closer and the american model is further away. By sunday afternoon, snow from new york city all the way up to maine. Heavy snow will continue into new england. Gusty winds and its going to be cold. Heres what were hook looking at as far as accumulations. New york city, philadelphia on up into the northern new england, 2 to 4, maybe 5 inches of snow. Heaviest snow around eastern massachusetts on up to Eastern Maine. Anywhere from 10 to 12 inches. The american model, almost no snow whatsoever. Northern maine hits the heaviest. Weve also got some in the appalachians. Heres what we think. Looking at all the models, putting them together, were going to say about 2 to 4 inches from washington, d. C. , new york city and west of boston. Boston will see 4 to 6 inches. The heaviest snow will be Eastern Maine and eastern massachusetts. Guys, right now, again, the well continue to watch it. Its the difference between the european model and the american model, continuing together. You have a story on those models and how people come up with that later on. Thatll be in the 8 30 half hour. Thank you. The president ial race is dominated by the stop Trump Movement this morning. The republican front runner now the target of conservative leaders. Theyre trying to block his potential nomination. Hes also being targeted by the hacker group known as anonymous. Hallie jackson is on the trail for us with more on all of it. Good morning. Good morning. This morning, as the stop Trump Movement tries to regroup and figure out a new way to slow down the front runner before the arizona primary, new fallout from the hacker group as it takes aim against trump. Not just his politics, but his personal life. Reporter now claiming credit for hacking donald trump, the wouldbe dictator. Were serious about stopping any foreright by the fascist donald trump. Reporter they claim to have posted his cell phone and Social Security numbers but those have been flowning around online for months. Law enforcement is investigating those who tried to illegally hack the candidates account. Anonymous probably trying to get attention for their socalled war on trump. In washington, a different battle to try and stop him. Less public, too. After a secret huddle of frustrated conservatives, reassessing how to slow trump down. These attack ads havent seemed to do more. Their plan, first call for a unity ticket. If that doesnt work, plot out strategy for a contested convention. Paul ryan acknowledging that scenario looks likely. Were getting our minds around the idea that could become a reality. Reporter now, taking aim at trump for warning what could happen at a convention if he get the nomination. Riots. Im representing millions of people. Nobody should say such things, in my opinion, because to even address or hint to violence is unacceptable. Reporter while the stop Trump Movement wants unity, theyre not saying who conservatives should unify behind. Ted cruz and marco rubio teaming up, shot down. Im not going to be anybodys vice president. Rubio praising cruz as conservative. Reporter this poster of liar, liar puts ted cruzs head on jim carreys body. If you kill ted cruz on the floor of the senate and the trial was in the senate, nobody new this morning, a scare at the manhattan apartment of Donald Trumps son eric. He had a letter sent with white powder inside. Sources say it was nobody harmful. Its yet another sign of how much attention trumps candidacy and his family are getting. Hallie jackson, thank you. Nicolle wallace is an nbc news policeal analyst and former adviser to the mccainpallen n ccainpalin campaign. Good morning. We talk about this trump thing as it has a ceo and a logo. Its fractured. While trying to get itself together, hasnt it almost missed a moment . After New Hampshire, the only way to derail trump was to put him in a one on one race. To have everybody coalesce behind one candidate. Whether it was ted cruz or john they were all still in the race at that point. That never happened. The central weakness of the stop Trump Movement is it never had a horse. It never had a strategy. It never built consensus around anal kerntive alternative. We just saw lindsey graham. I asked him whats the temperature in hell because he says hell will freeze over before i support ted cruz. Thats where they are as a party, hard choices. What does it say about ted cruz, that he may be the person in the best position to stop trump, but he cant get the party behind him totally . It would have been better if hed not lost all five contests tuesday night. If he had won, if he had a stronger showing this week, you might have seen more people get behind him. The truth about the antiTrump Movement exists behind these things. The temperament of trump. Two, the substance. Hes not a conservative in the minds of the conservative three, theyre worried about him filling the vital commander in chief role. Hillary clinton would be wise to go after the first group, people worried about his temperament and maybe the third, people who think he cant be a confident commander in chief. Right now, the stop Trump Movements only hope is he doesnt reach 1,237. Do you think republicans fear donald trump or dislike him more than they dislike hillary clinton. Nobody in the elite establishment would ever admit to being open to hillary clinton. As weve seen time and time again, theyre not the story. Theyre not the deciders, if i can borrow a word from my favorite former president. The voters are the deciders. A lot want to vote republican. Who want to see change. But who are uncomfortable with the idea of trump and cruz at this point. Thank you very much. Good to see you. Something else on the president s plate, a historic trip to cuba. Nbc nightly news anchor lester holt will be live in havana on sunday. He will have complete coverage. Over the president s pick for the Supreme Court. It is entering a new phase today. Pete williams is at the court for us this morning. Good morning to you. Good morning. Senators have left town for the easter break, giving Merrick Garland a break. But republicans insist his nomination isnt going anywhere. Reporter its a Supreme Court nominees ordeal, meeting senators one on one, hoping to win them over for a confirmation vote. So far, the welcome matt is out only at the offices of democrats, like harry reed, the minority leader. Republicans insist there wont be any hearing or vote because the next president should choose the nominee to succeed antonin scal scalia. The democrats say normally, the nominee would be up for a vote by memorial day. Hey, guys, do your job. Give him a hearing. Ask him questions. Say theyre willing to meet with garland, though nothing has been set up yet, and arizonas flake suggested voting on garland while president obama is in office if a democrat is elected president. I would rather have a less liberal nominee, like Merrick Garland, than a nominee that hillary clinton, if she were president , would put forward. Reporter but the Republican Leadership put out the word that an idea is not an option, and most in the party are following along. I dont think we should be moving forward on a nominee in the last year of the president s term. If it was a republican president , id say that. Reporter the white house released this photo of president Obama Meeting with garland. He told supporters to make themselves heard in demanding confirmation hearings. The Supreme Courts remaining eight justices are back in the courtroom next week. White house supporters are launching a website to push for garlands confirmation. We need nine. Org. Were hearing more from the alleged american isis fighter who was captured in iraq and still held there, and what hes saying about how he ended up with the terror group may surprise you. Nbcs chief Foreign Correspondent richard angle has the story. He says he joined isis but then had a change of heart. A u. S. Official told us this morning that because of the americans alleged time with the Organization Organization he does have intelligence. Reporter hes the first alleged american isis fighter to surrender to kurdish troops in iraq. Im from the united states. I studied criminal justice in college in virginia. Reporter in a taped confessional aired on kurdistan 24 tv, he described how he traveled through turkey, linked to mosul, an isis stronghold. The life in mosul, its really, really bad. The people were controlling mosul and dont represent the religion. Reporter these statements were made as he was held in captivity. I didnt really support their ideology ideology. Thats at that point, thats when i decided i needed to escape. Reporter to escape from isis, he said he crossed battle lines in search of kurdish forces, knowing they are close allies to the united states. At the time, i made a decision to go because i wasnt thinking straight. On the way there, i regretted. I didnt see myself living in america. Reporter a u. S. Official told nbc news isis is facing a growing problem of desertion, as the group comes under mounting military pressure and now a rare united states. But the charge is mainly a moral condemnation. Because the u. S. Is already fighting isis, its unclear if the rhetoric will change u. S. Policy. A u. S. Official told nbc news that american personnel have not yet met with him in custody, but that the kurds are debriefing him and passing that information along to the americans. Back to you. Thanks. It got tense on capitol hill over the flint water crisis. Resignations were called for michigans governor and the chief of the epa. People who put dollars over people do not belong in government. You need to resign, too, governor snyder. This was a failure of government at all levels. Local, state and federal officials. We all failed the families of flint. Governor rick snyder testified that michigans department of Environmental Quality assured him that the water from the flint water was safe when, in fact, it was contaminated with Dangerous Levels of lead. Both the governor and epa administer expressed remorse. Mccarthy said because it was under a state emergency manager, it prevented federal officials to be able to, quote, jump to the rescue. There were scary moments for passengers thursday on a flight from North Carolina to new york city. Take a listen. Just got hit by lightning. Roger, everything okay . Yeah, dont send us through there again. Its pretty bad. The American Airlines flight was preparing to land at flew into turbulent skies and was hit by lightning. The plane was diverted to jfk airport, a few miles away. Officials say it landed safely. 55 passengers on board. The faa will investigate the incident. A hearing is set today to revoke bail on labrie, the student convicted of sexually assaulting a classmate. Morgan radford has been following these developments. Another unexpected twist. Owen labrie admitting his missed his curfew but it was for a good reason. A judge must determine what happened and whats the punishment. Reporter this morning, owen labries future on the line again. A judge will decide whether the prep schooler who is accused of Sexual Assault against a 15yearold classmate should be put behind bars for violating it started when a reporter jumped into him on a subway around 1 00 p. M. And tweeted their conversation. Had to take a bus to dartmouth and be home by 5 00 p. M. Reporter a source said labrie thought the conversation was off the record. Prosecutors saw the exchange and filed a motion in court, saying he violated the conditions of his bail. Hes supposed to be at his mothers vermont home between 5 00 p. M. And 8 00 a. M. He traveled from New Hampshire to boston at least eight times since october. The question facing the court today isnt where he went but when he made it home. Most judges would look at that and say, tough. You knew what the rules are. Youve been convicted of a crime. Follow the ruling for your bail. Reporter labries lawyers say, yes, he traveled to boston and admits to violating his morning curfew on the occasions but only to see his lawyers and take classes he wanted to be insulted and threatened in public. I was waiting to see how the night went. Reporter the intense interest in labrie began last year. The country captivated by the elite prep School Setting where his accuser said the unthinkable happened. I was raped. Reporter her voice disgeist disguised, face hidden. You were excited to see her because you wanted to have sex with her. No. Reporter labrie said, i walked out of the courthouse with my chin up. Today, labrie back in the same courtroom where it all began. We reached out to the prosecutor and labries accuser but havent received a response. Labrie is expected to return to court today. If the judge decides he violated his tur cue curfew, he could be carried out in handcuffs. Thank you. Lets get another check of the weather from al. Were also going to be watching an area of heavy showers and thunderstorms through the gulf coast. To louisiana. Sunshine along the northwest coast. Sunny and chilly, weather making its way from the plains on into the great lakes. Well get to your theres something to be said for exploring the world around you. For seeking out the new; for trying the untried; for doing the undone. Why should snacking be any different . Discover all nine flavors of our creamy cheese and tap into your curiosity. The laughing cow. Reinvent snacking. Its bright start. Clouds will gather this afternoon. Turning windy at times. Gusts 20 to 30 miles per hour, maybe a sprinkle north and west. Still mild at 58. Windchills in the 20s. Skies clear. We start off the weekend bright and sunny with sunshine clouds increase late. Clouds tomorrow night. Snow sunday into sunday night. Mainly wet during the day. Some accumulating snow possible sunday, early monday morning. A warming trend to the middle and end of next week. Thats your latest weather. Matt . Al, thanks very much. Coming up, a clubhouse divided. What adam la roh shas teammates are saying after his decision to retire after dialing back his sons time with the team. Live interview with twitter Ceo Jack Dorsey ahead of the 10th anniversary of twitter. Are changes in the works . What does he have to say to his critics critics . Just ahead, oh, no, the photo capturing the pressure of the ncaa tournament. Thats my coach. Granddaughter steps int ever since jim signed up for lowes personalized lawn care plan, ive been up on my hind legs trying to get a better view of his grass. Its so beatif aghh cramp cramp my tiny unicorn legs cant take it. Now get 20 off pennington smart seed, at lowes. Soup and sandwich and cannonballs and clean and real and looking good and sandwich and soup and a little help and soup and sandwich and study group. Good, clean food pairs well with anything. Try the clean pairings menu. At panera. Food as it should be. If your family outing is magical you may be muddling try zyrtec for powerful and zyrtec is different than claritin because it starts working faster on the first day you take it. Muddle no more. The citi double cash card comes in very handy with cash back twice on purchases. Earn once when you buy, and again as you pay. Thats cash back now, and cash back again later. Its cash back d\j vu. The citi double cash card. The only card that lets you earn cash back twice on every purchase with 1 when you buy and 1 as you pay. P with two ways to earn, it makes a lot of other cards toilet flush if you need an opioid to manage your chronic pain, you may be sooo constipated it feels like everyone can go. Except you. Opioidinduced constipation, oic, is a different type of constipation, which may need a different approach. Longing for a change . Have the conversation with your doctor about oic, and ask about prescription treatment options. Mastering the enchantment of chocolate. Just in time for easter, the lindt master chocolatier is stirring up our finest chocolate. And bringing back our the one and only lindt gold bunny. And when everything is just right. The magic begins. This year, make the magic of easter come alive. Good morning, everyone. 7 26, friday morning. We will breaking news from manhattan today. A pedestrian struck to the upper east side. It happened around 6 30 this morning at 1st avenue and east 70th street. Chopper 4 was overhead while police were at the scene. Its not yet known which vehicles may have been involved in the accident. Were told the person who was hit was taken to the hospital in stable condition. Lets look at the morning commute. Heres lauren scala. Thank you. We still have delays out there in both directions on the m train. Thats due to switching problems. If youre getting on the roads, an accident also still