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 Bernie Sanders but with a margin of error its a virtual tie. Julianna goldman begins our coverage from d. C. By the way, if we win indiana bs over, okay . Wd then we can focus on crooked hillary, please lets focus on hillary. Reporter campaigning today in indiana donald trump was already looking past tuesdays primary. Just like Bernie Sanders said about crooked Hillary Clinton, she suffers from bad judgment. 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 fight 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 got to 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 likely nominee leaving the anyone but Trump Movement morphing into anyone but hillary. I will work against the divisiveness, 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 ppperdelegates to flip their support. Hed 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 is not an impossible road 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 threat lf coast heading y. Heres manuel bojorquez. Reporter large hail pelted parts of louisiana today where cvere storms also caused flash flooding. In new orleans the dangerous weather forced the cancellation 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 lrk, something said look outside. I looked outside, the first thing i said, oh my car. Were underwater. Reporter after flood waters receded in the east texas town of palestein, officials recovered the body of a sixth esowning victim. A 30yearold man who died in the same area as a woman and her four grandchildren 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 siy down this side of the property. Reporter 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. But 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 walking down the road and there are just srees and power lines everywhere. Reporter today the 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 manuel, 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, on the heels of a huge protest in baghdad yesterday. Jonathan vigliotti is in london. Reporter protesters clashed with Police Inside baghdads heavily fortified 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 qimpound, rarely seen by iraqi civilians. Yesterday thousands toppled the 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 Minister Haider 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 weekends 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 Chemical Spill in washington, d. C. This morning. A Freight 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. At 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 c. P. T. Which stands for jokes that white people should not make. Reporter 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, mr. President. Reporter mr. Obama roasted the president ial candidates, comparing Hillary Clinton to an aunt who doesnt understand facebook. Dear america, did you get my poke . Reporter he called 74year old Bernie Sanders the bright atw face of the democratic party. Bernie, you look like a million bucks, or to put it in terms you will 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 not in the room. Im a little hurt he is 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 mards. Obama out. Reporter the end of an era. 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 socalled gap year. A year off before she starts at harvard in 2017. The first family made the announcement on National College llcision day, the deadline for enrollment deposits. For those taking out College Loans the government just rolled out a new payment plan. And cbs new Business Analyst Jill Schlesinger is here with more. Jill, this is called the payback play book. We know that Student Loan Debt has ballooned. It has gone up by two times over e e 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 various repayment options that have existed since 2009. The Consumer Financial inotection bureau did a study. They found there were big problems with the loan servicers not giving enough information to rsudent borrowers. Glor so this just presents more options for payback. Absolutely. What it does is lays out three npecific 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 isis. Tts 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. You could 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, so 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 like with the mortgage crisis, that if borrowers dont have enough reformation, 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. And new images of a picture perfect princess when the cbs evening news continues. On the denture,at stils and that bacteria multiplies very rapidly. Thats why dentists recommend cleaning with polident everyday. 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. When agerelated macular have degeneration, amd we came up with a plan to help reduce my risk of progression. And everywhere i look. Im reminded to stick to my plan. Including Preservision Areds 2. My doctor said Preservision Areds 2 has the exact nutrient formula that the National Eye Institute recommends to help reduce the risk of progression of moderate to advanced amd. After 15 years of clinical studies. 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Flonase changes everything. Glor today marks the final performance for elephants at ringling brothers barnum and reiley 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 stands and taking their final bows. Here we go. Reporter ending a 200year spectacle that has enthralled fans and enraged animal activists for years. Kenneth feld is chairman of the 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 w it. Reporter the right time to retire these enormous animals with their starstudded tiaras that have been the subject of thousands of youtube videos from activists citing animal abuse. It is hard for me to believe that anyone would have to be dragged kicking and screaming into show business but for the elephants with ringling brothers that is exactly what happens. Reporter 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 200acre Conservation Center 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 fanfare. Oh say can you see reporter . As ringling s others. Er its the end of an era that should have ended a long, long time ago. Reporter Elinor Molgebott is with the Humane Society of new ngrk. This is so unnatural 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 humane and isnt causing suffering. Reporter the controversy wont end here. Ringling brothers says they will continue to use other animals including lions, tigers and horses for animal acts. Glor 33 rescued lions are finally paws down at their new home in south africa. Mee animals had been abused at usrcuses in peru and colombia before a rescue organization set up an airlift and flew them to a Big Cat Sanctuary north of johannesburg. Up next here, tell Alana Nichols she cant do something and she will. Will i take prilosec otc each morning for my frequent heartburn because you cant beat zero heartburn ahhh the sweet taste of victory prilosec otc. One pill each morning. 24 hours. Zero heartburn. Im terhe is. At golf. People say im getting better. No ones ever said that. But id like to keep being terrible at golf for as long as i can. Hes just happier when hes playing. But hes terrible. For the strength and energy to keep doing what you love, try new ensure enlive. Only patented ensure enlive has hmb, plus 20 grams of protein to help rebuild muscle. 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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 so hour surf session, im completely exhausted. Glor 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. Glor 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 sprint kayaking which will be a new sport at the rio games in september. Its very much a full body sport. What happens for an ablebodied 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 ablebodied shhlete is going to be able to stsh off their leg as they pull e,e water past them. And so for me, ive got my legs locked completely straight in here so i can actually catch the water and transfer my energy into the boat with my core strength. Glor her coaches told us Alana 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. Glor 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 released new photos taken by her mother. Ome 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. Poor mouth breather. Allergies . Stuffy nose . Cant sleep . Take that. A breathe right nasal strip instantly opens your nose up to 38 more than allergy medicine alone. 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And my teeth are stronger too. Crestpro health advanced. Is superior to colgate total. In these 5 areas dentists check. This check up . So good. Go pro with crest prohealth advanced. Moms right. Again glor we close tonight with r update on a story cbs news has been following for over a decade. Its a partnership between a community in crisis and a nun who has devoted her life to helping. Don dahler says the bond has only grown stronger. Reporter these arizona students at st. Peter Mission School in the Gila River Indian Community are running for their lives. Adult onset diabetes once known as a disease of the elderly is affecting children here as young as four. Knowing the propensity our people have for diabetes we start the day out with running. Reporter sister martha mary oorpenter is the schools principal. We dont teach subject, we teach children. And were giving them the skills, lifelong 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 pima indians lived off the land farming this desert. But after the gila river was dammed in 1930 to provide water to nearby phoenix, their farms dried up. 60 minutes visited this community in 2003. 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 guidelines for her students. Todays lunches are healthier. Low on carbohydrates, higher fr protein, fresh fruit and fresh vegetables. Reporter 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. Reporter 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. Reporter with her help, these kids now have a running start on the rest of their lives. Don dahler, cbs news, new york. Glor that is the cbs evening news for tonight. Later on cbs 60 minutes. Rsd 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 chaos. As may day marchers. Take to the stre plus the solar powered plane thats been sitting at Moffett Field all week. Finally set to take. In pitch dark. Nat highlight and steph who . Another stellar performancey the warriors without their star. As the blazers fold like a cheap suit. Good evening, im brian hac. Im juliette goodrich. Plenty of action in the baya on this may day. Honoring workers rights. In san jose hundreds marched neary hall demanding better wages. In oakland protestors call for a range of changes. Kpix fives mark joins us le from oaklands san antonio park. Where one of those rallies ended a little moren an hour ago. Mark . And todays protestors weret just marching for better pa work. This seemed to a be a rally for all types of caus. Nat marching perhaps the one thing hotter than toda sunshine was the frustration these marchers are feeling. what do we want. Justice. N do we want it. Now historically. May day. Al called international worke day. Was to fight for br conditions at work. Todays marchers went further. Including the fig against deportation too. Bi omar ali, arab resources and organizing centerdeporta does separate a lot of fami, and causes a lot of harm to lot of communities. Bite ka esteva, causa justaif a family is making less than minimum wage, and theyre ao having their family deporte that creates a crisis for t communities. From a higher minimum wage to black lives matter to students rights. Marchers say the seemingly different concerne in fact all connected. Bite brooks, cofounder, antipo terror projectunity and community. Mkand thatst today is all about. Cbthats what today is l about. And the power of the people. we have this vid with us today Oakland Police watched this years h from a distance rememberingl well that last may day turn rowdy when the sun went down. Vandals even looting businesses along auto row. So far. May day 2016 has sd peaceful. Bite cat brooks, cofounder, antipolice terr project the action has n been anything but peaceful. 2016 has stayed peaceful. Be cat brooks, cofounder, antipolice terror project the action has never been anything but peaceful. The excessive amount of policin that could do more to take things in an opposite direc than just the people in the streets together. That anger at the police wi come up again tomorrow. Many of these same marchers wille protesting outside the alama county Sheriffs Office tomw against police brutality. Thanks, mark. So far todays protests are a far cry from what we w last year