Rich primary on tuesday. One of marco rubios biggest obstacles donald trump, whose popularity grows, despite a distring of divisive string of divisive comments. Coming up, the trump effect, the topic of the week ahead. We begin this evening with a deadly bombing in turkey, a core bomb on the streets of ankara, 34 killed, 125 more wounded. Turkish government officials believing militants carried out the attack. So far theres no claim of responsibility. Paul brennan has more. The bombers targeted an area of a park and a care. An area comprise ing a bus station, commercial center and gardens, timed to strike at the crowds. There were chaotic scenes in the aftermath. In a statement the Governments Office says the blast was caused by a car bomb. Other reports suggested it was a suicide attack. The Prime Minister convened an Emergency Security meeting. The area is close to government buildings. A fleet of ambulances treated many victims, fire crews brought in to douse the flames and deal with the wreckage of vehicles caught up in the blast. A bus was destroyed. There was a woman sitting behind me. Her seat blew away. Something hit me here, and pierced through. There was a car, a black car. Five or six died in the bus. The neck of one severed. Something pierced me through here. I have one in my arm. Turkey has been hit by a spate of attacks since the middle of last year. Last month 29 people, mainly military personnel, were killed in a suicide car bomb attack which was claimed by a Group Calling itself the Kurdistan Freedom fulcans. In a gesture, the prokurdish htp party condemned the attack and expressed condolences for the victims, sundays attack coming two days after the embassy issued a warning for ankara, asking citizens to avoid specific areas of the city. The area of the blast has been sealed off by large numbers of police and Security Forces. A Major Investigation is under way, including detailled forensic examination. Alqaeda in maghreb is claiming responsibility for an attack at a resort in the ivory coast, several gunmen opened fire on beachgoers killing 14. Alqaeda claimed responsibility for that attack, the third of its kind since november. We have more from neighbouring nigeria. The gunmen were apparently roaming on the beach. Its not clear how they penetrated the hotels, whether they just walked in. These are the questions to be asked of the government and security services. The ivory coast has manage d to rebuild its image since the 20102011 postelection violence semicivil war. We have seen a huge return of ivorian people to the ivory coast, people coming back. Just last week ivory coast was named as the best investment destination in west africa. And, of course, as we know from the attack, its a popular destination, a popular tourist destination. People will be asking about the preparedness of the hotels, was, givem the geographical location of countries like mali, and burkina faso, were the Security Forces on alert for Something Like this or not. These are questions that will be asked. Its a concern for many people in improvement your, and the region, people can wonder if theyll experience other attacks in the region. Now, witnesses describe the now to the race for the white house. Here is what is at stake on tuesday in both democratic and republican primaries and caucuses. Florida, illinois, missouri, ohio. And g. O. P. In northern marianas. Theres 691 for democrats, 367 for republicans. For marco rubio, its a must win in florida, or he may have to call it quits. And robert ray have is in orlando, you see you nodded to that. Rory mcilrmarco rubio walked stage, hes trying to keep up hope. Reporter a weekend to remember, far towel the wrong reasons. Voters, protesters and candidates pulling out political tricks and analysts. Take no prisoners, in what may be a decisive moment in the 2016 election. I will campaign as long and hard as it takes. Well two to the white house and win the nomination. Donald trump could be unbeatable come wednesday night. Millions of additional people will vote. Its not for marco. Its for us. If the latest numbers are accurate. That looks to be the case. A cbs news poll shows donald trump leading with 44 of the voters, ted cruz with half of that. Marco rubio, in his home state, polling at 21 . Ohio Governor John Kasich out of the picture at 9 . I think im not going anywhere, ill just stay here. In ohio, another winner take all state with 66 delegates to donald trump and john kasich are deadlocked at 33 . And cruz is running short at 27 . And marco rubio barely registering at 5 . We have to get it. America needs it now. Reporter despite literally crisscrossing the state, senator marco rubio has not had much progress. He is wellknown in the miami area, but across the rest of the sprawling state his Political Base and machine are average at best. Meanwhile, Bernie Sanders pressures hillary clinton. But is polling behind the secretary of state in florida and ohio, the two that would yield the most delegates in the runup to the convention and nomination. I know we can have good jobs with rising incomes again. Join me, make it happen. Lets work together. Thank you so much. Rub on the stage behind marco rubio on the stage behind asking for as much help as they can give. These people have been cold calling across the state. And marco rubio needs all the help. Donald trump way ahead, and i talked to a few volunteers today, and interestingly enough, one of the gentlemen said i called about 400 people. And half the people are leaping towards donald trump in the primary, and i said what are they saying as to why, and they say most say trump can shake it up. Marco rubio is in deep trouble. Robert. Remarkable that he is getting support, marco rubio, in his home state where he was elected to the United States senate. Well check in later for more. Now to donald trump, who said he may foot legal bills for a 78yearold supporter. John mcgraw pumped a protestor in the face. A demonstrator may have provoked the suspect. He was sticking a certain finger up in the air. And that is a terrible thing to do in front of somebody that, frankly, wants to see america made great again. I dont condone the violence or what he did, but. Its possible you could help him with legal fees if this man needs it. Ive actually structed my people to look into it, yes rehabilitation eem jones was the rehabilitation im jones was punched. He said his group went, intending to observe. He said someone in the crowd cursed at him and his group. And within seconds they were being escorted out. Donald trump was back in illinois. The republican frontrunner spoke in blooming tonne, 2. 5 hours south of the windy city. As reported, the difference was like night and day. Do we love illinois, we love illinois. Donald trump at his rally, said it was the makeup rally for the one cancelled in chicago on security concerns. Scuffles broke out there when thousands of supporters scared off against thousands of protesters. They showed up at, like, the same time. It was totally organized trouble maker. Trump supporter betty was in was in bloomington and chicago. I didnt like it. I didnt like it at all. It was very scary, and i think that they shut down our right to hear him speak she saw a more sympathetic crowd here in more conservative rural downstate illinois, and this time a few dozen trump critics stood in the rain. I hoped it wouldnt get so violent here. We just dont want his values in our area. And in whats become a trump rally ritual protesters south out and down by the crowd and were mocked by trump. Get them out of here, get them out. And led away. [ chants ] there seemed to be a lot of what was taking place, people trying to get their name out there, their face, their word out. Reporter matt said he had a serious reason for coming here, and this is it, the mitsubishi plant closed last fall, putting him and 1300 others out of work. They moved the operations to southeast asia. Other countries sucking away our money, jobs, you close down your factories and manufacturing plants, and we are going to stop and keep our business here trump hit out at the usual targets. Unfairness by the media. A promise to make better trade deals and build up the military, and ripped into illegal immigration, pulling a young man on staining wearing a tshirt which red legal immigrant for trump. Trump alluded to a desire to ban muslims entering the country, by reading a poem called a snake, a woman that takes in a wounded snake and nurses it back to health. Instead of saying thank you that snake gave her a vicious bite. Back in chicago, theres no plans yet to reschedule the cancelled rally. The latest poll much cook county republicans puts trump in a third, but its downstate voters that gave him a statewide lead and he hopes victory in the tuesday primary looking forward to the summer. Theres concerns about protests in cleveland, particularly if no party locks up a nomination. Patricia sabga is live for us in cleveland. How is the si preparing for the possibility of unrest. City leaders are preparing for protests. Some are concerned is uncertainty growses tensions here could rise. This is the Cleveland City leaders want the world to see. When the Republican Convention comes to town in july. We can showcase a city that can come back, that can take a punch and knows how to reinvent itself. Reinvent through new businesses, a bombing heart scene and the return of an nba superstar. We have transformed. We think its a great story to tell. But another story may steal the spotlight this summer with divisions in cleveland and across the country over issues like race, police, poverty and politics here is a guy throwing punches, nasty as hell when we are talking. Its hot and heavy. People want to be angry. Activist protested outside a rally, saying theyll lead more compensations and expect theyll convention and spects theyll grow as the antitrump movement intensifies. We want people to be safe and expression our constitutional right. Which is the freedom of speech. Others struggled to strike the balance at post conventions. Cleveland says their city will do its best. If you break the law, you should be arrested. Because you are roasted doesnt arrested, does not mean you have to stay in gale until after the convention is over with. Cleveland officials are preparing for thousands of protesters, and 5,000 delegates and alternates that arrived at the arena in july. Some say they are worried as tensions rise, that it could boil over in cleveland. Especially if theres no clear frontrunner after the primaries, which means the convention could be contested. Now the convention gets longer, hours get longer and the tension grows on the inside venue, but outside the venue, i dont think anyone is prepared for that. Convention organizers say they will be. When you put on a 50,000 person plus event, we plan for a lot of contingencies, the possibility of a contested or open convention is one of those. All of city council is a failure. Activists worry with or without a contested convention, security and demonstrators could clash, as they did in protests over the acquittal of a Police Officer in the death of two unarmed people. That is a worry. Thats when people are hurt, or incarcerated, wrongly incarcerated. Some of the things you put in place is money. The city is giving Police Special training, coordinating with federal counterterrorism units and looking to by riot gear. City officials are trying to find the balance between protecting Public Safety and the right to free speech. What do you think about that . Its a great Public Relations statement. In fact, the citys number one, and their soul concern, is to have a convention that makes the attendees happy. This arena is surrounded by a number of streets, a concern that activists have is they wont be allowed on to the streets when the convention starts. They want to get cheese enough to t delegates to make voices heard. We reached out to the Mayors Office and the Police Department to talk about their plans for the protests, but they do not want to comment at this time. Thank you Patricia Sabga in cleveland. In a few minutes, a look at the week ahead. President ial candidate donald trump and race, as we head to a big week of primaries, what is behind the visible and sometimes violent racism among some of trumps supporters. Tonight at 8 30 eastern the war in syria lasted now for five years. [ gunfire ] and there is no end in sight. Next we ask the question will the peace talks really make a difference. And later lingering questions about a fatal crab at the it diter odd, the Worlds Largest dog sled race. Iditerod, the wor dog sled race. Tuesday marks five years since the beginning of syrias civil war, a war with no end in sight that left the country shattered. According to the syrian observatory for human rights. 270,000 have been killed since the war began, 80,000 civilians, 13,500 children. The United Nations estimates 13. 5 Million People have been displaced from their homes, with 4. 7 million fleeing the country. The numbers are estimates because of restricted a. B. C. To the war zone. The actual account is feared to be higher. James bays has the latest on talks under way in geneva. Hours before the syria talks were due to start in geneva. U. S. Secretary of state john kerry was in paris meeting with some of his european counterparts. He told reporters the cessation of hostilities in place for over two weeks had significantly reduced violence, but one side was not fully complying. The Syrian People support the cessation of hostilities, because it made their lives better. To date, the single biggest violator of that, buy allegation, is the Bashar Alassad regime. He hit out at the syrian Prime Minister. Who at a News Conference in damascus said there could be no negotiation about the role of president Bashar Alassad. Witness, the Prime Minister of syria trying to disrupt the process, sending a message of te terrence. The comments made as support of a high negotiating committee. We want to see an end to the bloodshed in syria. We hope that we see a serious partner. What is special about the talks is that demistura is going to get to the substantive issues. Who is going to be in a substantive government. Taking us to the key issue of Bashar Alassad, and those around him. On that, it seems no one is prepared to compromise. Joining us now from oklahoma, is joshua landers, thank you for joining us. We heard a report from james bays, the u. N. Envoy wanting to focus on substantive issues, including who would lead. The deputy perform saying no discussion about Bashar Alassad, so what do you expect from peace talks. We think it will be hooked pup on this. The Bashar Alassad is confident. Russians are backing it up. Hes under no pressure to lead the country, the opposition insisting that he has to say when he steps down and begin to have a transition government with new people in. It looks unlikely that will happen, as long as the russian aircraft and power supports the regime. And they are conquering more territory every week. Russia holds the winning cards here so far. Correct. By the way, what is irans role in this conflict . Russia holds the cards. When russia sustained into the syrian battlefield president obama said that the United States does not intend to fight a proxy war with russia for syria. That was a clear balance much statement. President obama will let russia have syria, in essence. Of course, john kerry, secretary of state john kerry put a tonne of pressure on the russians to come to the ceasefire. So far its worked. Everyone is astounded to the extent how it will be built on is the big question. What about iran, they are players if only on the outer per. Er, correct. They are players. They have been killed. He supported hezbollah and militias to fight in syria, iran is a key player, letting russia take the lead. Theres debate about whether irans nose is out of joint. Iran is a major player. They are all in. At least they are largely in. With respect to weapons, the ceasefire is providing an opportunity for all of the warring factions to take a pause and get some more weapons, more armaments. Absolutely. The Syrian Regime it termed and theyve been trying to capture as much of the boarder as they could. So they surrounded the rebels and placed them under siege webbingened them. Saudi arabia in particular said that shes going do that. They are not going to stand by whale the russians have their way. This is a pause. And well see whether kerry and lavrov can come to an understanding in this period here. So the talks resume tomorrow. Joshua, director at the center of middle east studies, thank you for joining us. Its a pleasure donald trump has, perhaps, redefined the way political campaigns are run in america. So if you see someone getting ready to throw a tomato, knock the crap out of them would you, seriously. Next, trump. I promise i will pay for the legal fees. Trumps apparent appeal to some racist. The topic of the week ahead. Complz our american story is written everyday. Its not always pretty, but its real. And we show you like noone else can. This is our american story. This is america tonight. Welcome back to Al Jazeera America, here is a look at the top stories, turkish government officials blame turkish militants for a car bomb explosion that killed 34 in ankara, 125 more were wounded in an attack at a crowded bus station. The prokurdish Political Party condemned the deadly bombing. Gunmen shot and killed 14 people on sunday. The attackers apparently targeted beachgoers at three hotels. Security forces killed six of the assa