Of the delegates and n two of those states, florida and ohio. In florida, our cbs news Battleground Tracker poll shows donald trump leading senator marco rubio two to one on rubios home turf, so tomorrow could be goodbye, rubio, tuesday. And its doordie for Governor John Kasich in his home state, ohio. He and trump are essentially tied there. Overshadowing all of this is the continuing problem of protests and occasional violence at trump rallies. Major garrett begins our coverage. Im not going to take the low road to the highest office in the land. Reporter john kasich is in a tight battle with donald trump in ohio, first contest the states governor has a chance to win. Today he campaigned with 2012 g. O. P. Nominee mitt romney, who has urged republicans to choose anyone but trump. And so this is the guy that ohio needs to vote for. Americas counting on you. Reporter kasich told u trump has gone too far. Well, i think when you run a campaign where youre dividing one against another or making these incendiary comments at a rally, thats a toxic environment. Its not healthy. Reporter adding that the world is now watching. Were not in some thirdworld country where theyre slugging each other trying to figure out who won an election. Were in america. Reporter ted cruz fighting trump for delegates in tomorrow nights contests in illinois and missouri faced an Animal Rights protester today and diffused the situation. Isnt it amazing that we can have that conversation without anyone getting violent, anyone insulting anybody . Thank you so much. Reporter the stakes tomorrow are perhaps highest for marco rubio, trailing trump badly in his home state of florida. He also called for unity. Tomorrow we have a chance to make a powerful statement to the country, and this is that the Republican Party is not going to allow itself to be hijacked by fake conservatives and people who go around reporter but the republican establishment has still not found a way to slow trumps mow men tumg. House Speaker Paul Ryan who recently said he would work with trump if he is the nominee said in a radio interview today that protest tactics at trump rallies were unacceptable. He also blamed trump for some of the unrest. I think the candidates need to take responsibility for the environment at their events. Theres never an execution for promoting violence or even a culture that preis up preis up poses it. Reporter ryan said anger among republicans is real, but he warned against fueling the fire. Scott, ohio tomorrow may show the country how hot that fire burns and whether it can be cooled or contained. Pelley major garrett, thanks. Well, there was a hot moment over the weekend when one protester seemed to go at trump himself. No one has been seriously injured in all of this, but the disruptions keep coming. And heres dean reynolds. Get em out of here. Reporter it was business as usual as Donald Trumps rally today in tampa. Get her out, please. Reporter emotions are running high at these events now because of what trump calls the disrupters. Theyre crazy. Reporter with him in tampa today, sarah palin electrified the crowd this way. What we dont have time for is all that petty punk ass little thuggery stuff thats been going on with these protestors. Reporter it was a reference to dayton on saturday where one protester actually rushed the stage, to kansas city where trump could barely finish a sentence. I got plenty of time. Reporter and to chicago where scuffles friday night between Trump Supporters and a large contingent of protestors inside the hall spilled out on to the streets. Trump campaign canceled the rally for security reasons. There were five arrests. University of illinois student demonstration was well planned. Tons of student organizations all over the campus got together, had meetings all week to stop this atrocity from happening. Reporter in tampa, we asked betty myrick and marsha craig about that as they headed into their third trump rally. Are either of you concerned at all about the demonstrators and hecklers . I am very concerned. I think the authorities need to do more about them because theyre impeding the ability of donald to get out his message and free speech. Reporter but trump does more than shout down his tormentors. Go home to mom. Go home to mommy. Reporter he bates them. Id like to punch him in the face, ill tell you. Reporter last week one supporter did just that to a protester, and trump says he might pay the punchers legal fees. Another thing that was notable about todays event in tampa, scott, is that trumps security detail was considerably larger, perhaps twice the size of what its been at previous rallies. Pelley dean reynolds, thanks. Its going to be a big day tomorrow for the democrats, as well, and a late night likely for them in illinois, our Battleground Tracker poll there Shows Hillary clinton and Bernie Sanders neck and neck. Nancy cordes is covering the democrats. Reporter sanders says the primary map is shifting in his favor. Tomorrow he needs to prove it with strong performances in a trio of midwestern states. This state lost 300,000 manufacturing jobs. Reporter in ohio, illinois and missouri, hes been hammering the message that delivered him a surprise win in nearby michigan last week. And the key difference between secretary clinton and myself is not only did i vote against every one of these disastrous trade agreements, i helped lead the opposition to them. Reporter its prompted clinton to talk tougher on trade, too. I will stop dead in tracks any trade deal that hurts america. Reporter and argue shes the candidate of the american worker. [inaudible]. Reporter she tossed back a guinness in blue collar youngstown, ohio, this weekend. Crowd hillary, hillary thank you. Reporter and rallied with plumb Centers Chicago this morning. Im going to fight for mesh labor. Reporter but its been hard to ignore the elephant in the room. Hey, ber first base get your people in line, bernie. Reporter especially since that elephant has been accusing sanders of sending supporters to disrupt trump rallies. Donald trump is a pathological liar. Reporter both candidates have grown increasingly caustic in their criticism of trump. In fact, tonight, scott, in illinois, clinton accused him of inciting the kind of mob violence that she said used to lead the lynchings. Pelley nancy cordes, thanks. Now well turn to some insight news inhouse expert on delegate math and all of the rules of primaries and caucuses. Anthony, looking forward to tomorrow, if donald trump wins florida and ohio, will his nomination be inevitable . Hell be all but certain, scott. He wont clinch, but hell have a commanding lead in delegates and be in a commanding position to get the rest he needs, first because the rules now start to change. The way that states give out delegates with more winnertakeall contests tends to favor the leader and make it harder for trailing candidates like cruz and kasich to catch up burke more than, that trump will also be heading into a map beyond tuesday that should favor him politically. There will be contests in the northeast, in the west, places that are full of the kind of blue collar suburban republicans that are voting for him already. So the thinking will go if they cant find a way to stop him tomorrow, in places like florida and ohio, its hard to see how they suddenly find a way to stop him at. Tomorrow if trump wins florida, as seems likely now, but loses ohio, which is possible . It will become much harder for him to win the nomination outright. And thats what his opponents, cruz and caseic, are hoping for. Sloam him down if not to catch him. It will give a glimmer of hope to those who want to see this process go on into the spring, maybe even into the summer and to the convention. Pelley anthony salvanto, our cbs news director of elections. Anthony, thanks. Severe storms including a tornado swept through western ohio today. Cell phone video captured the twister on the ground northwest of dayton. No injuries reported, but a number of buildings were damaged. Floodwaters are rising in the deep south after days of relentless rain. The pearl river on the louisianamississippi border is expected to crest tomorrow at the same height as a devastating flood in 1983. As much as two feet of rain fell across the region. More than 6,000 buildings in louisiana have been damaged. Two people are in Critical Condition tonight. 30 others were also injured when an amtrak train flew off the rails overnight near dodge city, kansas. The southwest chief was headed from los angeles to chicago when the engineer noticed a twisted rail ahead. He hit the emergency brake but it was too late. Investigators checking to see if an earlier vehicle accident bent that rail. In a surprise move today, russian president Vladimir Putin declared Mission Accomplished in syria and said he is ordering the withdrawal of most russian forces. Since september russian warplanes have pounded opponents of syrias assad dictatorship, turning the tide of the fiveyearold civil war. With russian air cover, assads forces have captured considerable territory from the rebels, a partialse reduced but not eliminated the fighting. The ceasefire does not apply to isis, which still controls about onethird of syria and iraq, including the city of mosul, with nearly two million residents, which has been cut off from the world since isis took over in 2014. Well, tonight Holly Williams has rare insight into whats happening there. Outside of mosul she met refugees who risked everything to escape. Reporter its close to midnight on the front line just outside mosul, and these kurdish soldiers are hundreds of yards into nomansland. Is someone coming . Theyre not isis fighters, but a man and a teenage girl. The man, stripped to his underwear to be searched, guarded by the kurdish soldiers, who fear he could be a suicide bomber. But these people h death to escape isis, walking for miles through the night as theyre finally allowed to cross through a trench and into safety. And then one by one come 12 more men, some of them handing over guns. Its an extraordinary sight, because very few people have managed to leave mosul after isis began sealing it off. Stopping civilians from fleeing. And banning cell phones. Overcome with relief, these men wanted to tell us why they fled but begged us to hide their identity to protect family members still living in mosul. These are torture marks, said this man. They heated wire and used it to burn me. His only crime was smoking, illegal under isis and its harsh this man said he saw another mosul resident beheaded after being caught with a cell phone sim card. If they thought you were faking, what would have happened . He told us three men were caught escaping a few days ago and isis hanged them in the street. There theyre a criminal gang, cried this man, and weve been surviving on water and bread. Is there any sign that isis is getting weaker . When they first came they were tough, said this man, but now they can see that mosul is turning against them. The men told us they planned to fight against isis themselves now theyre free and to smuggle their wives and children out of mosul as soon as they can. This was just one night on the front line, but what we heard suggests that people in mosul are growing with isis, and, scott, that could make retaking the city a little easier when iraqi forces eventually begin their offensive to recapture mosul. Pelley holly, nice to have you here for once where nobody is shooting. Holly williams, thank you very much for a remarkable report. In a first, an american citizen fighting for isis surrendered today in northern iraq. Kurdish forces are holding him. They posted this video of him. He was said to be holding a virginia drivers license. The white house and the pentagon are working to confirm the americans identity. Bob schieffer weighs in on the state of the g. O. P. 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Use dulcolax tablets for gentle overnight relief suppositories for relief in minutes and stool softeners for comfortable relief of hard stools. Dulcolax, designed for dependable relief pelley 2 yale Mens Basketball Team is going to the ncaa tournament for the first time in more than 50 years, but the campus is in an uproar after Jericka Duncan is looking into this. Reporter when the yale bulldogs celebrated on sunday, they were missing star point guard jack montague. Today his attorney, max stern, confirmed that in february montague was expelled for allegations of Sexual Assault. Stern released a statement citing an independent yale investigation that found montague developed a relationship with a female student which led to consensual sex in 2014, but its the fourth time they allegedly had sex that is in dispute. She states she did not con sent. Montague says she did. The team had to apologize after appearing to support montague wearing shirts with his nickname. Posters later appeared on campus warning the bulldogs to stop supporting rapists. Somebodys got to be here to help us out. Reporter head coach james jones says his players are in situations like this you have to come in close together, believe in each other and fight harder. Reporter fighting Sexual Assault is an ongoing battle at yale. In 2015, a survey found that more than 16 of yale students reported they had been a victim of Sexual Assault. Mary haviland is executive director of new York City Alliance against Sexual Assault. There has been an increase in the number of students coming forward to report Sexual Assaults at yale. What does that say about the culture there . I actually think it says that were Getting Better at what were doing perhaps and that students are feeling more comfortable coming forward. Reporter the University Says students are not expelled without careful consideration, and, scott, montague has not been criminally charged. Pelley jericka, thanks very much. 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If trump wins the nomination before the convention, and it looks like he probably will, its going to turn the Republican Party on its ear. If it goes to an open convention, it will be a bloody fight that could break the party into two parties. In either case the Republican Party, scott, as we used to know it will be replaced by something new. Exactly what that will be is uncertain. And that is the scariest part of all because the one thing that always bodes ill in politics or economics or National Security matters is just that uncertainty. Pelley do you think trump could actually win the presidency . Reporter he could but historically nominees who come from outside their Party Mainstream do poorly. When republicans split in 64 and nominated barry goldwater, they had an historic landslide when democrats nominated George Mcgovern in 72, he lost every state but massachusetts. Under the old rules, scott, what this is coming down to is basically a couple of very flawed candidates. 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Tell your doctor if you have Liver Disease or are taking other medications because these may increase the amount of xifaxan in your body. Tell your doctor if you are pregnant, plan on becoming pregnant, or are nursing. The most common side effects are nausea and an increase in liver enzymes. If you think you have ibs with diarrhea talk to your doctor about xifaxan. Pelley president obama welcomed Alexander Hamilton to the white house today for an encore. Heres chip reid. Im thrilled the white house called me. Reporter in 2009, lin manuel miranda, a 29yearold rapper and broadway producer, was invited to the white house. Without a father. Got a lot further by working a lot harder reporter he performed his brandnew rap song about. Alexander hamilton. His name is Alexander Hamilton reporter it got a standing ovation, now seven years later hamilton is the biggest hit on broadway. Today miranda was at the house again along with the shows cast for a workshop with high school students. What do our favorite hiphop artists do if not write about their struggles and their circumstances so well that they transcend them. Thats exactly what hamilton did. What did i miss what did i miss reporter actor daveed diggs plays actor Thomas Jefferson as youve probably never seen him before. Reporter the big project of this show is trying to erase as much distance between the audience and these figures who wed who we used to know as paintings. We want to make these real people, fleshandblood people. Reporter at Loudoun County high school in virginia, students preparing to perform at the white house workshop told us why theyre so crazy about hamilton. You memorize these raps and youre like, inow too much about aaron burr all of a sudden because i listened to this song. It kind of takes these old dead people and they apply them to people that we see every day and people that we interact with, and they dont seem to dead and old. Im the damn fool that shot him reporter its been a long time since the Founding Fathers seemed this alive but just you wait whats your name Alexander Hamilton reporter chip reid, cbs news, the white house. Pelley and thats a rap for the cbs evening news. For all of us at cbs news all around the world, good night. As a Small Business owner, you know things have a way of moving fast. But if your network cant keep up, it can really slow you down. So switch to the 100 Fiber Optic Network of verizon fios. Youll get 99. 9 network reliability, and the fastest wifi available. Get fios 50 meg or higher internet and phone for your last chance to get 250 back. Hurry, this offer ends soon. Call or go online today. Small business is better on a better network. Right now at 7 00, the father of an alexandria man accused of defecting from isis becomes enraged when questioned about him, and terrifying moments when a townhouse collapses on firefighters. Good evening. Im jan jeffcoat. But we begin with the latest from Prince Georges County and the shooting of officer jacai colson who was shot and killed in a shootout between three brothers and police. Reporter the police chief sait