John kasich stopped campaigning in indiana to give cruz a better chance of taking delegates from trump. On the democratic side the poll Shows Hillary clinton four points ahead of bern yoa sanders but with a par begin of error its a virtual tie. Julianna goldman begins our coverage from d. C. By the way, if we win indiana its over, okay . And then we can focus on crooked hillary, please lets focus on fillry. Campaigning today in indiana donald trump was already looking past tuesdays primary. Just like bern yoa sanders said about crooked Hillary Clinton, she suffers suffers from bad judgement. And you cant have her be your president. Reporter a double digit win would put trump on track to secure the majority of delegates needed to win the nomination before the summers convention which would spell doom for ted cruz. Were going to go to a contested convention. Reporter the texas senator can only win with a floor flight in july. And today he hit all five sunday shows insisting hes got a viable path. Donald knows he cannot earn a majority of the delegates that were elected by the people. And you gota win a majority. If you cant win a majority, it means you cant unite the party and you cant win. I feel that donald trump is probably leading. And if he does get the nomination. Reporter but even cruzs supporters are joining Establishment Republicans in accepting trump as the lickly nominee leaving the anyone but Trump Movement morphing into anyone but hillary. I will work against the di viciveness, the mean spiritedness, the hateful rhetoric that we are hearing from donald trump and others. Reporter clinton is also gearing up for a trump matchup, while the delegate math works against Bernie Sanders, today in washington he called on superdelegates to flip their support. And he vowed to stay in through the convention. That is admittedly, and i do not deny it for a second, a tough road to climb. But it to climb. Reporter sanders is predicting a contested convention but one area where he is losing steam is on the money front. Jeff, he brought in 26 Million Dollars in april, far less than the 46 Million Dollars he raised in march, raising more questions about his viability through the summer. Glor julianna goldman, thanks very much. At least six people were killed by a flash flood this weekend in east texas. Another round of intense storms threatens the gulf coast heading too monday. Heres manual bojorquez. Reporter large hail pelted parts of louisiana today where severe storms also cautioned flash flooding. In new orleans the dangerous weather forced the cancelation of the citys acclaimed jazz fest. And across the louisiana border in arkansas layfayette county. How are we going to get out. Reporter high water stranded residents like robbie henry. And i was getting ready for work, something said look outside. I looked outside, the first thing i said, oh my were underwater. Reporter after flood waters receded in the east texas town of pal stein, officials recovered the body of a sixth drowning victim. A 30 year old man who died in the same area as a woman and her four grand children friday night. When nearly eight inches of rain fell in one hour. 60 miles north in lynndale texas the cleanup from a tornado that destroyed businesses and homes continues. Theres just trees all the way down this side of the property. From where we are standing here you cant even see the house, its all trees. Its all trees. Reporter katie smith says her family friends, these three teenage girls survived by seeking shelter in a closet. That there was so much debris that reaching them at first was difficult. I was completely scared. You know, i had no idea what i was walking into. My children were upset. They were crying. You know, we were you can whatting down the road and there are just trees and power lines everywhere. National Weather Service confirmed the tornado that destroyed these homes here in lynndale was a category ef2 with winds up to 115 miles per hour. Jeff, the system continues to track east into alabama and parts of the deep south. Glor thank you. This weekend american and french jets destroyed an isis car bomb factory in iraq. In other parts of the country isis was on the attack today. Only the heels of a huge protest in baghdad yesterday. Jonathan vigliotti is in london. Reporter protestors clashed with Police Inside baghdads heavily forthified green zone as demonstrators demanded an overhaul of what they call a broken government that has failed to provide basic Services Like water and electricity. This green zone is not the property of any member of the parliament. Its the property of the iraqi people said habib albattat. And he and hundreds of others made themselves at home in this International Government compound, rarely seen by iraqi green zones blast wall and stormed parliament. Cell phone video shows lawmakers escaping in cars. The crowd backed by popular shiite cleric Muqtada Alsadr demanded Prime MinisterHaider Al Abadi overhaul his cabinet which they say is part of a corrupt political system put in place by the u. S. After the invasion in 2003. This weekend Security Breach came less than 48 hours after Vice President joe biden visited the iraqi capitol in a show of support for al abadi who the u. S. Regards as a stable partner in the war on isis. But there is concern isis is feeding off this political instability. This afternoon the Group Carried out twin car bombings that rocked the southern iraqi city of samawah. More than 30 people were killed. It is the latest in a recent wave of attacks. Jonathan vigliotti, cbs news, london. Glor the cleanup continues following a Train Derailment and d. C. This morning. A frailt train went off the tracks flipping 14 cars on their side. The train was carrying sodium hydroxide used in Household Cleaning Products but no evacuations were ordered and the spill has been contained. Last nights White House Correspondent dinner president obama made his final appearance while in office. And jamie yuccas has details. The end of the republic has never looked better. Reporter this year marks president Barack Obamas last correspondents bash which may have been his finest performance. I know i was a little late tonight. I was running on cpt. Which stands for jokes that white people should not make. Mr. Obama known for his well placed zingers made the job of comedian Larry Wilmore even harder. I have to admit its not easy to follow the president , man. You got some jokes,. The president ial candidates, comparing Hillary Clinton to an aunt who doesnt understand facebook. Dear america, did you get my poke . Reporter he called 74 year old Bernie Sanders the bright new face of the democratic party. Bernie, you look like a million bucks, or to put it in terms will you understand, you look like 37,000 donations of 27 each. Reporter 20 minutes in, he pretended to be wrapping up. Im just kidding. You know im going to talk about trump. Reporter who was no not in the room. Im a little hurt is he not here tonight. Reporter once he got started the punch lines kept coming. There is one area where donalds experience could be invaluable and thats closing guantanamo. Because trump knows a thing or two about running Waterfront Properties into the ground. Reporter the president s last laugh came as just two words. Obama out. Jamie yuccas, cbs news, new york. Glor the first familys first daughter has decided where shes going to college. Harvard will be malia obamas new home. Not quite yet, though. She is taking a so called gap year. A year off before she starts at harvard in 2017. The first family made the announcement on National College decision day, the deadline foreign rollment deposits. For those taking out College Loans the government just rolled out a new payment plan. And cbs new Business AnalystJill Schlesinger is here with more. Called the payback play book. We know that Student Loan Debt has about looned. It has gone up by two times over the last ten years, 1. 3 trillion in outstanding debt. I think the bigger problem is that about one in four students is actually in default or delinquent on the loan. And the government was really wondering why werent more people taking advantage of similarious repayment options that have existed since the Consumer FinancialProtection Bureau did a study. They found there were big problems with the loan servicers not giving enough information to student borrowers. Glor so this just presents more options for payback. Absolutely. What it does is lays out three specific ways that students can pay back their loans. And they do it in plain english, no fine print. So let me give you an example of this. Lets say your current plan is a loan for ten years and youve got 271 a month payment. Then you say well, what would happen if i had an accelerated payment that started low and went up to a larger number at the end. Could you start at 152 a month. And then there is a plan that is just based on your income, and that would be the lowest payment it would occur over 20 years. So you have three plans. You figure out which one is the best one for you. Glor but none of this is set in stone yet what is the next step. So right now were going to see some Public Comment on this. But the government is really wanting to see this plan implemented as soon as possible. And frankly, theyre very concerned that le borrowers dont have enough information, theyre going to be behind the eight ball. Again the Student Loan Debt problem is a huge issue. And this is one way to help address it. Glor jill, thanks very much. Thank you. Glor up next here, circus elephants pack their trunks for retirement. 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Before treatment, get tested for tb. Tell your doctor if youve been to areas where certain fungal infections are common, get tested for tb. And if youve had tb, hepatitis b, are prone to infections, or have flulike symptoms or sores. Dont start humira if you have an infection. Raise your expectations. Control is possible. Unless you have allergies. Flonase is the first and only nasal spray approved to relieve both itchy, watery eyes and congestion. No other nasal allergy spray can say that. Go ahead, embrace those beautiful moments. Flonase changes everything. Glor today marks the final performance for elephants at ringling brothers barnum and becamey circus after years of pressure from Animal Rights groups. Demarco morgan reports on this. Ladies and gentlemen reporter the greatest show on earth is letting go of its biggest performers, 11 asian elephants performing their last head stand and taking their final bow. Here we go. Reporter ending a 200 year spectacle that has en enthralled fans and enraged animal activists for years, Parent Company that owns the circus. It is a bittersweet decision, there is no question about that, but it is the best thing and we felt this was the right time to do it. Reporter the right time to retire these enormous animals with their star studded tiaras that have been is the ubt of thousands of youtube videos fighting an all abuse animal abuse. It is hard for me to believe that anyone would have to be dragged kicking and screaming too show business but for the elephants with ringling brothers that is exactly what happens. It is part of a huge shift of attitudes for animals in entertainment with sea world phasing out its killer whale shows at its amusement parks last month. These elephants will retire to this 200 acre Conservation Park in florida run by the owner of ringling brothers. More than a dozen circuses still tour with elephants but none as widely or with as much fan fair. As ringling brothers. Its the end of an era that should have ended a long long time ago. Elinor molgebott. This is so ununusual for them. They shouldnt be subject to abuse. More people that know that will enjoy the circus more knowing they are going to something that is not inhumane and kawsessing controversy. The controversy wont end here. Ringling brothers says they will continue to use other animals including lions, tiger and horses for animal acts. 33 rescued lions are finally paws down at their new home in south africa. The animals had been abused at circuses in peru and colombia before a rescue organization set up an airlift and flew them to a big cat sank area north of johannesburg. 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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 glor she is the First American woman to win gol in both the summer and winter paralympics. Her name is Alana Nichols, already a champion in wheelchair basketball and alpine skiing, now before the rio game this summer, nichols has picked up two new sports and 60 minutes sports paid her a visit. Reporter its called wave skik which nichols just pic she says it gives her freedom outside her wheelchair. On this day, she had her longest ride ever. By the time im done with the two hour surf session im completely exhausted. Reporter Alana Nichols is constantly in motion. If i dont push up that hill, i dont get my heart rate going. I dont sweat, i dont breathe hard. Thats really important to me. She spends hours in the gym strengthening her upper body. Often pulling hundreds of pounds of weights. She only started training a year and a half ago in sprifnt kayaking which will be a new sport at the rio games in september. Its very much a full body sport. What happens for an able body kayaker is they basically do what is called a reach. You reach as far out as you possibly can. You catch the water with your kayak and then an able bodies athlete is going to be able to push off their leg as they pull the water past them. And so for me, ive got my legs locked here so i can actually catch the water and transfer my energy into the boat with my core strength. Reporter her coaches told us Elana Nichols has an uncanny ability to learn quickly. Shes able to reach an expert level when others are still figuring out the basics. Tell me i cant do something and i will. Nichols has overcome enormous personal challenges along the way. You can see the full report on 60 minutes sports tuesday night on showtime. Princess charlotte is celebrating her first birthday tomorrow. And to mark the occasion Kensington Palace revealed new photos taken by her mother. Some of the candids of the princess at play and others looking a bit more serious. Still ahead here, the nun who has never given up poallergies . Reather. Stuffy nose . Cant sleep . Take that. A breathe right nasal strip instantly opens your nose up to 38 more than allergy medicine alone. Shut your mouth and say goodnight, mouthbreathers. Breathe right. Shall we say, unnecessarily complex. H back cards are, limiting where you can earn bonus cash back. Then those places change every few months. Please. Its time you got the quicksilver card from capital one. Quicksilver earns you unlimited 1. 5 cash back on every purchase, everywhere. Doesnt get much simpler than that. Whats in your wallet . That reminds me. Anyone have occasional constipation, diarrhea. Gas, bloating . Yes one Phillips Colon Health probiotic cap each day helps defend against occasional digestive issues. 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Knowing the propenceity our people have for die bees diabetes we start the day out with running. Sister martha Mary Carpenter is the schools principal. We dont teach subject, we teach children. And were giving them the skills, lifelong healthy healthy habits. Reporter some of the 230 boys and girls enrolled in this k through 8 school are already clinically obese. A few tipping the scale at nearly 300 pounds. For thousands of years the pina indians lived off the land farming this desert. But after the gilla river was dammed in 1930 to provide water to nearby phoenix, their farms dried up. 60 minutes vis its rare to see a physically fit person here. And according to the National Institutes of health, they are still among the most obese americans. Back then sister martha had taken on the federal government and won. She was granted permission to modify the Federal School lunch guide lines for her students. Todays lunches are healthier. Low on carbohydrates, higher on protein, fresh fruit and fresh vegetables. The results are visible and invisible. This year we may have several children who are prediabetic but we dont have any children who have that dreaded disease. After 33 years of fighting for these kids, this battle has become personal. When i see their smiley faces and their running feet, just makes my day. With her help, these kids of their lives. Don dahler, cbs news, new york. Glor that is the cbs evening news for tonight. Later on cbs 60 minutes. And first thing tomorrow, cbs this morning. Im jeff glor in new york. Good night. Captioning sponsored by cbs captioned by Media Access Group at wgbh access. Wgbh. Org this morning, metro station was shutdown. A car confirmed for leaking. Rail service continues to be disrupted in that area. We covered this incident since the beginning. We go to northeast dc, stephanie . Reporter debra, we just got an update from metro here. In the next few hours they are going to run some trains on the track to test everything out. If all goes well the service will