The latest on campaign 2016 in a moment. But we begin with breaking news from germany where president obama ask set to announce the u. S. Is significantly increasing nns military presence in syria. Margaret brennan is traveling with the president tonight. Margaret . Id reporter tomorrow the president will announce that the u. S. Is sending up to 250 military personnel to syria to join local forces fighting isis, bringing the total number of u. S. Military personnel to 300. This as the president today was pushing for a major trade deal here in germany. President obama and german chancellor merkel are pushing a controversial trade deal that brought more than 30,000 e otesters to the street this weekend. They fear the so called Transatlantic Partnership would weaken Environmental Standards and consumer protection. But president obama defended the pact that would create the Worlds Largest free trade zone. If you look at the benefits to the United States or to t rmany of free trade around the hrld, it is indisputable that it has made our economy stronger. Reporter the support for mr. Obama still popular in europe could help merkel who is facing a host of crises that have damaged her public standing. Chancellor merkel has been consistent. She has been steady. She is trustworthy. Reporter her decision to allow more than one million refugees safe haven in germany over the past year has spiked public fears of a security threat. She is on the right side of history on this. She is giving voice, i think, to peopkinds of principles that bring people together rather than divide them. Reporter president obama added that he is closer to merkel than any other world leader. Jeff, perhaps thats a parting gift to an important ally in this farewell tour of europe. Glor margaret brennan, thank you. Nkve states have primary elections on tuesday. Democrats and republicans are voting in connecticut, rhode island, delaware, maryland, and pennsylvania with a combined 556 delegates at stake. Our new Battleground Tracker poll out today shows republican frontrunner donald trump leading the field by a wide margin in delegaterich pennsylvania. On the democratic side Hillary Clinton leads Bernie Sanders by eight points. Weija jiang is tracking the races. Reporter donald Trump Supporters today waited nearly seven hours to see him in hagerstown, maryland. I have spent the least and im number one. Wouldnt you rather have that for the president than somebody that just. Reporter trump is expected to perform well in all five states voting on tuesday. The latest cbs news Battleground Tracker shows him dominating in pennsylvania, leading by 23 points. While Trumps Campaign has made recent efforts to reshape his image to act more president ial, trump has defied and even mocked the idea of a transformation. Trump supporters seem okay with that. A lot of people, a big crowd here. The eyes of the country are all on the hoosier state. Reporter ted cruz is already focusing on the next contest, campaigning in indiana today. Hes hoping to close the five point gap between him and trump before may 3rd. We have work to do. Reporter Hillary Clinton spent the morning visiting churches in philadelphia and the afternoon in connecticut. I would be so honored and tumbled to have your vote on tuesday. And i want you to know that if fiu will vote for me on tuesday, i will stand up and fight for you through this campaign, all the way in to the white house. Reporter clinton even appears to be making an impression on at least one billionaire republican donor. Today charles koch said this. So is it possible another clinton could be better than another republican this time . Its possible. Reporter but Bernie Sanders says dont count him out yet. In we are going to continue. Were going to fight this until hhe last vote is cast. That is what democracy is about. Reporter sanders has softened his attacks on clinton during this latest round of campaigning, pressing her on policy changes instead. Jeff, just today he urged her to support a tax on Carbon Emissions to curb climate change. Glor weija jiang, thank you. Lets bring in cbs News Elections director anthony salvanto, also in d. C. Anthony with donald trump up in pennsylvania and up in indiana, how are voters feeling right now . Well, some sense of , evitability is creeping in, jeff, as most in indiana say they think donald trump will be d e likely nominee, including half of ted cruzs voters. But the key here is will taking expected wins here in pennsylvania and elsewhere on tuesday, then indiana the following week was touted as one of the last places that the stop trump forces could make a stand. But hes up there too. Glor what does that do for trumps math, does it get him closer to clinching. It will certainly keep him on path. You he now has a clear sight line to the nomination. If he does well it would put him in a position to clinch but still not until we get near the end of the process in june. Glor on the democratic side things appear to look good for Hillary Clinton. How do voters feel on that side . Well, theres also a feeling among democrats that clinton is the likely nominee. But Bernie Sanders voters still strongly support him. And they say he is having a positive affect that he is pushing Hillary Clinton toward more of the progressive policies that they want, jeff. Glor anthony salvanto, thank you very much. Thank you. Glor late today officials called the killings of eight members of an ohio family on friday a preplanned execution. Ce manhunt continues in southern ohio for whoever is responsible and tonight David Begnaud is in pike county, ohio. Reporter Law Enforcement have now finished collecting evidence from the homes where the killings took place. And tonight crews are searching the wooded areas around those properties. Ohios attorney general mike dewine is leading the investigation. Do you think the perpetrator was a stranger to the family or do you think the individual was a known to the victims . I think we should not speculate about whether or not the assailant or assailants were known to the family or not. Reporter the Pike County Sheriff Charles Reader said the killer may have had help. You have multiple crime scenes. Lau have eight people in a family that there murdered in llur different locations. Reporter some of the victims apparently put up a fight. Others were shot dead in their sleep. All suffered gun shot wounds to the head according to authorities. The surviving members of the roaden family have been warned. They are the only apparent targets. There has been no other family targeted in this county but them. Eight members of the family. I told them we would be there if they needed anything. I told them to be armed. Reporter at the dogwood festival in downtown piketon wnis afternoon, the crowd was smaller than usual. Courtney boyer came with her infant. People are scared to come out with that person who shot all e ose people running around here. Whu dont know who it is or what theyre capable of doing. Reporter Brandi Theobald grew up around the victims. She is nervous. Uncomfortable, sad, just on edge, just waiting for Something Else to happen. Reporter seven of the eight autopsies have already been completed. The final autopsy will happen tomorrow. Jeff, the attorney general said this afternoon there were three marijuana grow operations found at the crime scenes and the attorney general said drug activity and Gang Activity are being considered as possible titives but nothing is certain as of right now. Glor David Begnaud, thank you. Federal agents came under fire in kansas this weekend. At least three were hit including two u. S. Marshals and an fbi agent. They were shot while looking for a suspect at a motel in topeka. The agents are expected to be okay. An 18yearold who opened fire. T a wisconsin prom last night has died. Police shot jakob wagner after he shot two people leaving the prom at Antigo High School where he had been a student until last year. Police believe he chose his targets at random. Wagners victims are expected to survive. An explosive fire has destroyed a large apartment complex under construction in gilbert, arizona outside phoenix. The ruins were still moldering today. Heres jericka duncan. Reporter from a helicopter you could see just how far the flames traveled. The fire could be seen for miles away. Vee National Weather service tweeted that smoke was even picked up by weather radar. At least 120 firefighters responded. Because of the wind, extremely fast. The flames, i felt like i was getting i a tan. Reporter it happened just after 6 00 last night at an apartment complex that was under construction causing exposed rnod from 17 buildings to burn fast. Heavy wind gusts spread the flames to neighboring homes asrcing the evacuation of at least 100 people. Three firefighters had to be treated for smoke inhalation. One firefighter suffered burns to his hands. Captain gary hildebrandt. We had some fire units there that had to move their truck to the east because the fire was rapidly approaching their trucks and kind of overwhelming the firefighters. Reporter today fire investigators combed through bbris while police still had the area blocked off. Those who were evacuated are being allowed back into their homes tonight, jeff, because the fire covered such a large area, it could be days before fire investigators determine a cause. Glor jericka duncan, thank you. The fire danger is not limited to arizona. For more on this we turn to wbz meteorologist Pamela Gardner, pamela . The northeast has also been dealing with red flags warnings and enhanced fire danger the last couple of days. And especially going into , morrow too, it will be another dry day. But the southwestern u. S. Dealing with red flag warnings, fire weather watches as well as high wind watches and advisories out already for monday. So any wildfires that do develop could spread very quickly. Glor i know the midwest is also looking at a very active weather week. A yes, the midwest and into the t ains. Severe weather threats tonight but also as we go into especially tuesday and the harecast models have been hinting at the potential for covere weather outbreak. We have a couple of systems. And this Second System is one we are focused on that is still developing across the Pacific Northwest but as we get into tuesday night well see the potential for some scattered severe thunderstorms, and the threat for damaging wind, large hail and the potential for some tornadoes, too. Glor Pamela Gardner thank you very much. There was a small private farewell to prince this weekend after the singers remains were cremated, friends and family s thered outside his estate to celebrate his life. And as jamie yuccas report, the hometown celebration is still going. Reporter through the storm clouds the sounds of prince rang out from tower bells. For a half hour the bell played the superstars hits like 1999. Under umbrellas fans listened and reflected on his legacy. Its an emotional moment. I think maybe you start to understand that he is actually gone. Reporter at the jehovahs witness hall that prince attended, friend and musician larry graham who introduced him to the faith was emotional. Elder Jim Lundstrom said the iconic rock star was an active member of the faith even going door to door handing out pamphlets. He was a brother, a spiritual brother, of course its sadness. Reporter princes remains were cremated on friday and his family and Close Friends including sheila e held a private funeral at his paisley park home saturday night it was nweekend of remembrance for prince rogers nelson. Purple rain, purple rain. Reporter in brooklyn last night, Bruce Springsteen opened his show by playing purple rain. Times have changed, styles have come and gone but no matter what prince is never not been cool. Reporter nbcs saturday night live aired a special tribute show. The show included a neverbefore seen video of prince performing at the shows 40th anniversary after party. A. M. C. Movie theaters across the country are playing princes movie purple rain. In Eric Claptons facebook tribute he wrote the movie helped him write his song holy mother and called prince a light in the darkness. T the was fear there would be a public memorial but the family says there is one in the works and fans are paying tribute by buying his music. Jeff, since his death, princes music is at the top of the billboard charts and all top ten songs on itunes are prince songs. Glor jamie yuccas, thank you very much. Up next here, an historic flight to california, without a drop of fuel. And winds whipped up chaos at a track meet. When the cbs evening news continues. Thats life. You diet. You exercise. And if you still need help lowering your blood sugar. This is jardiance. Along with diet and exercise. Jardiance works around the clock. To lower blood sugar in adults with type 2 diabetes. This can help you lower blood sugar and a1c. And although its not for weight loss or lowering systolic blood pressure, jardiance could help with both. Jardiance can cause serious side effects including dehydration. This may cause you to feel dizzy, faint, or lightheaded, or weak upon standing. Ketoacidosis is a serious side effect that can be lifethreatening. Symptoms include nausea, vomiting, stomach pain, tiredness, and trouble breathing. 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Seriously now, talk to your doctor or pharmacist today about a vaccine that can help prevent shingles. Glor theres an update on an historic flight around the world powered entirely by the sun. Overnight, the Solar Impulse 2 finished its journey across the Pacific Ocean flying from hawaii to californias silicon valley. And the trip isnt over. Heres chris martinez. Wonderful. Reporter after 62 hours in the air nonstop the Solar Impulse 2 passed over the Golden Gate Bridge before gently gliding back to earth. Good morning, california. Reporter lone pilot bertrand raccard described his experience to us just hours before touching down. The view is absolutely gorgeous. Reporter the experimental s rcraft runs entirely on solar power. The wings which stretch wider than a boeing 747 are covered with 17,000 solar cells. They constantly recharge the planes batteries, allowing it to travel up to 60 Miles Per Hour during the day, holding enough charge to continue to fly at night. C we love to show that green. Echnologies can achieve the impossible. That we can fly longer, without fuel, than with fuel. Reporter the Solar Impulse 2 began its journey just over a year ago. First taking off in abu dhabi. Mps now made nine separate flights in an attempt to circle e e globe. Tit there have been complications along the way. After landing in hawaii last summer, the aircraft was grounded for nearly ten months e cause of heat damage to the battery system. The plane finally took to the skies again last week prompting a call to the cockpit on earth day from the headquarters of the united nations. You look like an astronaut in the moon. What you are doing today in new york, signing the paris climate agreement, is more than protecting the environment. E is the launch of the Clean Technology revolution. Reporter from california the plane will head to new york before attempting to cross the atlantic and finally completing its voyage. You are in a story not finished though. Reporter a story that could one day change the way we fly. Chris martinez, cbs news, los angeles. Glor up next here, lights out for real at a playoff game today. Going too often, and the strong sudden need to go. Ask your urologist if botox® can