Boom, boom, first round. Cruz and kasich unite against trump. Their goal is to stop donald trump. Do we really want to turn on the television and see two rich new york liberals debating the general election . As for the democrats, Hillary Clinton is looking ahead to the general election already searching for a running mate. We are the future of the democratic party. We look forward to fighting this out through california. The u. S. Is adding more military might in the battle against isis. Ive approved up to 250 personnel including special forces to keep up the momentum. Statewide man hunts intensifying for whoever shot and killed eight members of the same family in ohio. This could be drug related. It could be gang related. It could be revenge. Former browns Quarterback Johnny Manziel indicted in a Family Violence case, accused of assaulting his exgirlfriend. Beyonce debuted her new album, described as her second visual album. All that the greatest basketball player. Isaiah thomas put his son in front of the microphone. They have finally won the series snl dedicated the airwaves to prince. And the boss played one for prince. Purple rain purple rain on cbs this morning. Puerto ricos debt crisis was the focus of last weeks tonight and some Founding Fathers star power help. Paul ryan at your house ill wear my hamilton blouse citizens are suffering stop the bleeding, stop the loss help puerto rico its just 100 miles across thank you. Announcer this mornings eye opener is presented by toyota. Lets go places. Welcome to cbs this morning. Charlie rose is and assignment. Norah odonnell is off. Youre in good hands. Anthony mason is with us along with josh elliot along with our Digital Network. Thank you to you both. Republican rivals ted cruz and john kasich are teaming up to stop donald trump. The two candidates announced late last night they will Work Together to try to prevent donald trump from winning three upcoming primaries. Hes accusing them of collusion and calls their effort a, quote, everything thats wrong in washington and our political system. It begins with the indiana primary a week from tomorrow as cbs news Battleground Tracker poll shows trump leading cruz there by five points. Major garrett is in washington to look at the possible impact of two political rivals targeting the frontrunner. Major, good morning. Reporter good morning. Ted cruz and john kasich are essentially treating the battle for the gop none nation like a Tag Team Wrestling match. This Unprecedented Alliance comes in advance of what is expect ed to be a fivestate primary sweep by trump on tuesday which means it may be too little too late. Im only interested in the first ballot. Im not interested in second, third, fourth, 19. Reporter donald trump predicted he would win the nomination outright. This late night statements sunday, strategists for both ted cruz and john kasich announced a bold new plan to stop him. Kasichs camp will, quote, give the Cruz Campaign a clear path in indiana while cruz will, quote, clear the path for governor kasich to compete in oregon and new mexico. The strategy adds fodder to trumps accusations that cruz is using under handed tactics to sway delegates ahead of a possible contested convention. Cruz is going and hes whini wining and dining and bribing people. Reporter cruz denied trumps charges. I told the delegates backstage, listen, i cant send a 747 to fly you to 18 holes of free golf at mara lago. That aint going to happen. Reporter still, trump said he feels like a boxer in a rigged match. The judges are going to be against you just like this system is rigged because mr. Trump, let me tell you, the judges cant help if i knock that guy on his ass if i knock him out. Reporter if he doesnt prevail at the Gop Convention if a guy that is losing by all those millions of votes wins, ill tell you what, were going to have some people very, very angry. Really. Theyre going to be very angry. Reporter kasich, despite lagging way behind in both poll numbers and delegates, told face the nation hes looking at potential running mates. Whats your reaction to that . You dont want to have yourself in a position you have to pick somebody out of a hat. So i have some skilled hands who are beginning now to take a look and figure out who would really fit. Reporter weve also learned that cruz may announce his running mate before indianas may 3rd primary. No decisions on this front have been made. The name that comes up most in cruz world, karly fiorina. Lets go back to the cruz kasich alliance. Do you think it could backfire . Reporter i havent seen anything like it. It could backfire. Theres no time for kasich or cruz to worry about the backfire aspect of this. They have to consolidate the antitrump vote and any super pac money that may come along and do it now. They have to gain the attention of those republicans still on the fence about trump, and this is the best way to do it both strategically and in the media. So this strategy is high risk in every respect. It is unprecedented in every respect. Its really the last option that cruz or kasich or antitrump forces of any kind have left. Major garrett, thank you for that. Meanwhile, polls show that Hillary Clinton is the favorite in all five democratic primaries tomorrow. The Clinton Campaign starts running a new tv ad today in pennsylvania, connecticut, and maryland. Its goal to bring democrats together before the july convention but Bernie Sanders is not ready to go along with that just yet. Nancy cordes is in philadelphia where both candidates will hold rallies tonight. Nancy, good morning to you. Reporter good morning. Thats right. He is not standing down at all. In fact, of the five states that vote tomorrow, sanders hit all five over the weekend and he was all over the airwaves, too. He is also still going after clinton, though with a new nod to reality. That is not secretary clintons view. Reporter with his white house prospects dwindling, sanders has begun pushing clinton more overtly to adopt his agenda. Madam secretary, if you are concerned about climate change, join me in imposing a tax on carbon. Reporter the latest cbs news Battleground Tracker finds nearly eight in ten pennsylvania democrats now expect clinton to be the nominee. But nearly half say sanders has had a positive influence on her candidacy because he made her adopt more progressive views. I support the fight for 15. Reporter this was clinton last night in connecticut. For goodness sakes, lets raise the minimum wage. Its not right people are mired in poverty. Reporter clinton drew tentative support sunday from one of the biggest conservative donors, trump critic and billionaire industrialist charles koch said he might back clinton over the gop nominee. Its possible, well, that her we would have to believe her actions would be quite different than her rhetoric. Reporter lyclintons campai responded that shes not interested in endorsements from people who deny Climate Science and try to make it harder for people to vote. The campaign also worked furiously to back down reports that they were beginning to consider possible running mates. Clinton herself had no comment. Im just working hard to win on tuesday. Reporter the clinton camp worries talk of a vp now will make it look as if she is taking it this race for granted even with 15 states left to vote, and thats why her Campaign Schedule has not let up at all. In fact, of the five states voting tomorrow, clinton hit four of them over the weekend. Shes very busy. Thank you very much, nancy. President obama confirmed this morning that he will send an additional 250 american troops to syria. They will work with Opposition Forces trying to defeat isis. The president delivered the news in hanover, germany, before meeting with leaders of four european allies, one group of militias fighting isis in syria says theyre happy to get more troops, but they need more weapons, too. Margret brennan is traveling with the president. Shes in aerzen, germany, good morning. Reporter good morning. Well, the president s decision expands the American Military presence inside of syria, something he has been reluct an to do. But this is an attempt to squeeze isis hard before he leaves office. The additional u. S. Troops will intensify pressure on isis inside their stronghold of syria. Ive approved the deployment up to 250 additional u. S. Per n personnel in syria including special forces to keep up this momentum. Theyre not going to be leading the fight on the ground, but they will be essential in providing the training and assisting local forces they continue to drive isil back. Reporter the 250 special forces expands the u. S. Presence from 50 commandos to 300 inside syria. Theyll provide intelligence, support and logistics to kurdish and arab forces who are fight to go recapture raqqah, the capital of the islamic state. The u. S. Insists these forces will not be in combat but admit they will be in harms way. The announcement comes just days after the president deployed another 200 advisers to help fight isis in iraq. European allies still reeling from recent terror attacks urged the u. S. To do more, specifically create a military protected safe zone inside syria to stem the flood of refugees. But the president said yesterday that would require a large number of ground troops, a commitment hes still unwilling to make. It is very difficult to see how it would operate short of us essentially being willing to militarily take over a big chunk of that country. Reporter now the decision to send more troops comes as the president s attempt to broker a ceasefire in syria has collapse ed. Gayle, he blames russia and the assad regime for that failure which has complicated his efforts to ebbed the war. All right, Margaret Brennan reporting from germany, we thank you. We mentioned charlie rose is interviewing president obama today in germany. Well bring you parts of the interview tonight on the cbs evening news with scott pelley and then tomorrow morning and tomorrow night on charlies program. An investigation whether a tornado touched down near houston. Firefighters in league city, texas, believe Severe Weather cause add power line to explode and catch fire last night. Earlier in the evening people reported seeing funnel clouds form. High winds tossed around debris, a trampoline wound up in the bed of a pickup truck. There are no reported injuries. A huge manhunt is under way this morning for whoever killed eight members of an ohio family in what authorities call preplanned executions. Their bodies were found friday at four separate crime scenes in the pike county area, roughly an hour south of columbus. David begnaud talked with the two men leading the investigation outside piketon, ohio, close to where some of the bodies were found. David, good morning. Reporter good morning. Within the last 24 hours teams have fanned out through wooded areas right near the crime scene. Investigators are specifically looking for evidence that may have been left behind by the killer, male or female. As of this morning in terms of a motive, investigators are looking at everything from revenge killing to gang involvement to possible drug activity. Three marijuana grow operations were found at the crime scenes and this morning the local sheriff says there may well be more than one killer. What is it that opens the door to the possibility there may be more than one killer . You have multiple crime scenes. You have eight people in a family that were murdered. So is there a possibility one person may have came to one house, then to another, then to another, then to another . Yes. And then ten or better miles away is another crime scene. Reporter Pike County Sheriff Charles Reader says he has never dealt with a mass killing like this. The members were members of the rhoden family. Seven adults and a 16yearold young man. Authorities say some of the victims put up a fight, all of them shot in the head. There is blood all over the house. Okay. My brotherinlaws in the bedroom. It looks like someone has beat the hell out of him. Reporter 19yearold hanna rhoden was killed as she slept next to her 4dayold infant. That baby and two other children were not shot and had been placed in state protective custody. Weve received over 100 tips. Weve done between 50 and 60 interviews. Reporter and you have the 25,000 reward. We have a 25,000 reward for someone who gives us good information. Reporter the surviving members of the rhoden family have been warned, it is their family that was the target. I told them to be armed, to be prepared, to protect themselves. Reporter this rhoden relative was too scared to even have his face shown on camera. All of us are torn up and, you know what i mean, freaked out because we dont know theres still killing. Reporter mike dewine is ohios attorney general a facebook threat directed to the family mentioned chris rhoden jr. Are you aware of this facebook threat . I am aware of the facebook threat. Every piece of information is valuable and our investigators are certainly take that go into consideration. Reporter seven of the eight autopsies have been completed. The last one is going to get should be finished by the end of the day today. You heard the sheriff say he has told the rhoden family to arm themselves. I can tell from you speaking with rhoden family members who wont even put their face or name on camera all of them are armed right now. A very scary story. Thank you very much, david. Investigators this morning are trying to pinpoint exactly what caused the death of prince last week. Interest in his music is soaring. The very best of prince is number one on the billboard charts. And prince dominates the top ten songs on itunes right now. Jamie yuccas is at the music icons paisley park home. Jamie, good morning. Reporter good morning. Princes publicist says a musical celebration is being planned at the same time a state senator is introducing a bill to make purple minnesotas official state color. It is one of many tributes pouring in for prince. Reporter days after princes unexpected death, those who loved him are still struggling with the sudden loss. Im finally able to kind of just doesnt feel real. Still reporter at princes paisley park home, family and friends handed out mementoes to fans. Princes final resting place will also remain private. They didnt know him like we do, so we want to keep it as that. Reporter sunday minnesotas hockey team held a moment of silence. And on saturday prince was honored by another music great. Never meant to cause you any sorrow reporter Bruce Springsteen opened his new york city concert with a classic. Purple rain purple rain reporter nbcs saturday night live aired a special tribute featuring neverbeforeseen footage of the singer performing at the shows 40th anniversary after party. Reporter newly released footage shows prince addressing an atlanta audience earlier this month during what would be his final performance. Once again, i have to apologize for the cancellation. Reporter while it could be weeks before autopsy results reveal more answers, fans continued to descend upon his home. The last place he was seen alive. Theodore matthews says he drove 23 hours from virginia to pay his respects. I really believe in my life i will never meet and love another artist like i have loved prince. Reporter authorities do not suspect foul play or suicide. Prince is said to have thousands of master recordings worth millions of dollars. Under Minnesota State law it says the closest blood relative would inherit it all if there isnt a will. Prince has one full sister and many half siblings who would split it. Thank you very much, jamie, reporting from minnesota. You know, i was there saturday night when Bruce Springsteen walked out. Youre scream and screaming because youre so glad to see him and then he starts singing purple rain and have thousands of people go quiet just to hear bruces voice singing that song. He said prince inspired him when he went to go see him perform. It was quite a moment. A beautiful thing. Purple rain has been on perpetual hum all weekend long. Meanwhile, golden state could face yet another playoff game without its star player, steph curry. He slipped and sprained his right knee during sundays playoff game against houston. It was his first game back after he missed two games with a sprained right ankle. That does not look good. Now it did not keep the warriors from winning. They took a 31 series lead in the best of seven affair. Golden state hosts game five on wednesday. Curry is set to have an mri today as californias bay area holds its collective breath. You really hope hes in good shape. There was pain going down. A shooting outside a High School Prom trapped studentsen side for hours. Ahead, why a school from the kpix weather center, good morning. We have a view this morning towards the skyline of San Francisco, pristine but you cannot see how down right blustery it is with the winds out of the northwest at 15 increasing to 20 and temperatures in the 40s to low 50s and chilly out the door. 50s, 60s, and up to 70 and rain arrives on wednesday. Beyonce opens up and takes aim at her husband. Ahead, how the lease of a revealing new album is allowing beyonce to gain further control of her music and career. The news is back in the morning right here on cbs this morning. Mastering the art of refinement one dark chocolate rises above the rest lindt excellence created by our master chocolatiers pure, rich, darkly intense. Made like no other crafted elegantly thin to reveal complex layers of Flavor Experience excellence with all your senses and discover chocolate beyond compare try lindt excellence with a touch of sea salt. Fight heartburn fast. With tums chewy delights. The mouthwatering soft chew that goes to work in seconds to conquer heartburn fast. Tum tum tum tum. Chewy delights. Only from tums. The wolf was huffing and puffing. Like you do sometimes, grandpa . Well, when you have copd, it can be hard to breathe. It can be hard to get air out, which can make it hard to get air in. So i talked to my doctor. She said. Symbicort could help you breathe better, starting within 5 minutes. Symbicort doesnt replace a rescue inhale