>> glor: it is the biggest presidential primary day of all. with just one full day left until supertuesday, a new cbs news battle ground tracker poll shows donald trump and hillary clinton ahead in key states. >> you've been hit, one down in front of the suv. >> glor: also tonight a virginia police officer gunned down on her first day on the job. under arrest an army sergeant also accused of killing his wife. the flint, michigan, water crisis. newly released e-mails revealed failures and frustrations in the governor's office. >> and the gim ns exploding the internet and breaking up the routine.

support and what you did is very nontraditional. >> not traditional at all. >> this is the cbs captioning sponsored by cbs this is the "cbs evening news." >> glor: good evening, i'm jeff glor. on march 1s some candidates might get their last chance. supertuesday brings caucuses and primaries in 12 states. for republicans about half the delegates needed for a presidential nomination are up for grabs. for democrats it's about a third. a new cbs news balt el ground tracker poll shows donald trump comfortably ahead in the key supertuesday states of georgia and virginia. but trailing ted cruz in texas. cruz's home state. hillary clinton leads bernie sanders in the three biggest states voting on tuesday. georgia, virginia and texas. we have both races covered beginning with a new controversy surrounding trump today. here's major garrett. >> i don't know anything about it, okay david duke, i don't know anything about what you are talking about with white sprem

>> he demurred when asked whether he would condemn supportive comments from david duke. >> i have to look at the group. i don't know what group you are talking about. you want want me to condemn a group i know nothing about. >> but his comments today are 180 degrees from his stance friday when he was asked about duke's endorsement. >> i didn't even know he endorsed me, david duke endorsed me, okay, i disavow, okay. >> trump' republican rivals pounced. john kasich said trump has some explaining to to do. >> done all trump refused to disassociate himself and condemn white supremacists. right. we don't have any place for white supremacists in the united states much america. twitter. >> we should all agree racism is wrong. kkk is abhorrent. >> in virginia marco rubio called trump's position unbelievable. >> we cannot be a party that nominates someone who refuses-- refuses to condemn

we cannot be a party that does that. >> trump appears inkrsing-- increasingly disenchanted with that party and said today he is prepared to run as a third party candidate if necessary. >> the republican party is not treating me right. and they're not treating the people that i represent right. >> and there is some evidence to support trump's claim. a new cbs battleground poll found more than half of republicans in three supertuesday states georgia, texas and virginia, say the republican party does not represent them well. >> that poll also showed voters in those states believe trump offers the most optimistic message of any republican still in the race. in alabama tonight trump picked up the endorsement of jeff-- the state's junior senator and long time advisor to trump on immigration policy. >> glor: major garrett, thank you very much. hillary clinton expanded her lead over bernie sanders with a primary victory in south carolina last night. julianna goldman has more on how clinton won and what it means

>> tuesday is the primary. >> reporter: hillary clinton stormed into arkansas and tennessee on sunday setting her sights on the handful of southern states that vote on supertuesday. and trying to capitalize on her momentum with black voters who propelled her landslide victory in south carolina. nearly 90% of african-american voters backed clinton yesterday breaking the record set by then senator obama in 200 will. that-- in 2008. that spells trouble for sanders who hoped to stal clinton's momentum heading too states where the democratic primary electorate is more diverse. >> we did really, really badly with older african-american voters. i mean we got decimated. >> the vermont senator has wrapped up delegates in iowa, new hampshire and nevada largely with the support of younger and whiter voters. so as clinton stays south, sanders is visiting states where the demographics play to his favor like in oklahoma where he campaigned today. >> now i am going to need your

i'm going to need your help to win the democratic nomination. nd and i'm going to need-- i'm going to need your help to win the general election. (cheers and applause) >> reporter: clinton meanwhile is turning her focus away from sanders and pivoting to her next target republican frontrunner donald trump. even if like earlier today in a memphis church she's not mentioning his name. >> until last night, america has never stopped being great. our task sk to make america whole. >> reporter: behind the scenes clinton allies in the democratic national committee are also working through various strategies to run against trump but not all establishment democrats are coa less-- coa

gab bard endorsed sanders. >> thank you. more than 1500 delegates in all are up for grabs in supertuesday in the dozen states. for more we've joined by director of elections anthony salvanto. we just horde about the democrats. it was just a month ago hillary clinton barely won in iowa. it was two and a half weeks ago she was soundly defeated in new hampshire. what has changed. >> the ground has now shifted to very friendly territory for her, jeff. these states have high concentrations of african-american voters, they make up the majority of voters in most of these southern states and they are solidly behind her. >> glor: that said you are still seeing some issues. >> yeah, she still trails bernie sanders on items like being principled to honest and trust worthy, things her campaign win or lose on supertuesday need to shore up in the long-term. >> glor: there was so much talk about marco rubio after the last debate and about the establishment trying to get behind one candidate. voters done seem to be listening

>> when voters hear the word establishment they hear it as a bad word. they say they are less likely to vote for any candidate without is seen too tied to the party establishment. >> glor: they're not just siding with trump because they think he's anti-establishment, they think he can win the general. >> they i think he is in the best position to win in november. >> glor: anthony salvanto, as always, thanks. >> thanks, jeff. >> glor: a young police officer is being remembered tonight. she was killed this weekend during do her first day on the job. following an awful series of events in northern virginia. jamie yuccas has details. >> prince william county virginia police department posted this picture of rookie officer ashley guindon about to start her first shift. the caption, be safe. chief steve hudson. >> she was literally sworn in the day before on friday. >> reporter: before becoming a u.s. marine reservist, she interned for the police department. >> she clearly had a passion to

>> reporter: guindon and two other officers responded to a saturday. when they arrived, suspect ronald hamilton opened fire from the front door. >> we have three officers that have been shot. >> reporter: guindon's training officer and ten year veteran david mckeown along with eight year veteran jesse hempen were wounded and are expected to survive. >> officers provided first aid to the wounded officers until fire and rescue staff could get on scene. later in the afternoon, officer guindon succumbed to her injuries. >> reporter: hamilton eventually surrendered. police found his wife dead inside the home. the couple has an 11 year old son who was not harmed. hamilton is an active duty staff sergeant who works at the pentagon. no one knows why he fired on the officers. neighbor leon harris described

>> the guy, he was a good guy. >> reporter: early sunday morning more than a hundred patrol cars lined up outside the hospital where officer guindon was taken am they provided escort to a young woman whose first day on the job tragically became her last. hamanaka il ton is expected to be in court tomorrow. he faces one count of capital murder of a police officer and is being held without bond. and jeff, the county attorney penalty. >> glor: jamie yuccas, thank you very much. in utah anger over a shooting by police last night sparked violent protests that closed part of downtown salt lake city. here's meg oliver. >> violence exploded late saturday night after a salt lake city police officer shot a 17 year old black teenager in the chest and stomach. shooting. >> when the cops came, they ran up to him, pulled their guns out

and as he was turning around they shot him. i know, i seen it shoot his chest and stomach. >> the suspect is still breathing. >> police responded to a call to break up a fight outside this homeless shelter. police say they opened fire after mohammed refused to drop the weapon. ku tv jeremy harris was one of the first reporters on the scene. >> the witnesses were very worked up. they were very angry. you could tell there was a lot of passion. so many people saw this, at any given time there are at least 50 if not a hundred or more people that are standing outside of the homeless shelters. >> reporter: as the crowd-- protestors launched rocks and bottle hes at about a hundred police. >> absolutely and without question the witnesses say this was about race. in fact several people walking by chanting black lives matter. >> reporter: all salt lake city officers wear body cameras. police told me they will release the video of the shooting as soon as possible. mean time mohammed is in critical condition and two officers are on routine paid

>> glor: meg oliver, thank you. in hesston kansas more details following a mass shooting this past thursday, manual bojorquez is there with a surviver story. >> adam miller came face to face with the shooter. >> i saw him come around the corner and he looked kind of confused. and so i told him he needs to run, there is a fire. and he just looked confused. so i told him again. and he said i know, and then he shot me. >> reporter: cedric ford shot 17 people thursday including 14 coworkers at excel industries killing three of them before police shot and killed him. investigators believe he acted out in violence after being served with a protechive order taken out by an ex-girlfriend. across hesston today it was a time to come together. at sunday services to honor the victims. and at a townhall meeting where sergeant chris carter one of the first on the scene was embraced by the community.

that place were phenomenal. their actions were heroic that day. >> reporter: hesston strong has become a moto here. >> they're all going through a really tough time. the least i could do is come out o and help. >> reporter: for many, healing also means forgiveness and compassion, even for the killer. >> i don't know what he was going through but obviously he felt this was the way out. and sco my heart just aches for him. >> reporter: there will be a memorial service tonight here at hesston high school. next week ford's ex-girlfriend is expected to face a judge for allegedly giving him weapons knowing he was a convicted felon. >> glor: thank you. syria remains relatively calm tonight two days into a partial ceasefire. but as elizabeth palmer reports from homs, the quiet has brought little comfort. >> reporter: threeries ago the old city of homs was the fiercest front line in syria.

and the war and the rebel fighters moved on leaving a wasteland and hundreds of thousands of homeless people. in some parts residents are trickling back, reestablishing the essentials of life, commerce, even school. this is day two of the partial ceasefire and people are holding their breathe hoping it will hold. right on the edge of town we can hear the sounds of fighting, though. but with no moniters anywhere, it's impossible to say who is attacking who. the numerous reports of violations today underline what a fragile thing the partial truce is. but 48 hours in, everybody agrees things are much quieter than they've been in years. so the kind of lasting peace necessary to rebuild in a place like this still feels a very long way off. elizabeth palmer, cbs news, homs. >> glor: in iraq today dozens were killed in about a hundred hurt in two bomb attacks. the first went off at an outdoor

minutes later the same location, a suicide bomber blew himself up. a group a fill writted with iceician claimed spobilityd-- claimed responsibility. a series of gas explosions in a russian coal mine have killed at least three dozen. it happened in northern russian above the arctic circle. 81 minors were rescued after the original blases. but those still trapped are presumed dead. >> coming up we follow the new e-mail trail in the flint water crisis. and a storm battered cruiseship the cbs evening news continues.

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the old water source. in this e-mail released this weekend, treasury deputy thomas saxon told the governor's aide gentlemen, in the attached is a scripg of what it would cost to reconnect to detroit-provided water. i assume/hope no one is still option. the estimated cost was $12 million a year. the city eventually did reconnect to detroit water in october of 2015. days after the governor declared flint's river water unsafe. the announcement was triggered by an independent study that linked lead poisoning in children to the city's drinking water. behind the scenes, a former press secretary discussed a plan to send the governor to flint to quell protests. one thing we keep hearing is that the governor is not involved or is detached. this would be good to show that he is there and he cares. and if we don't announce until he's there, we can avoid the protests and still get the optics.

the falloutings with early predicted in an e-mail sent more than a year ago when the governor's special projects manager wrote, this is a public relations crisis waiting to explode nationally. friday the governor admitted that he should have been more directly involved back when his aides first e-mailed about the problem. >> that's where i am kicking myself every day. i wish i would have asked more questions. i wish i wouldn't have accept-- would have send answers. i'm not going to have that happen again. >> reporter: snyder says he's working to expand health-care coverage for flint residents and sub is i died diez their water bills. adriana diaz, cbs news, chicago. >> glor: up next here, an

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an elephant went on this rampage and started picking up trucks and flinging them around. no one was hurt including the guy who was on the elephant's back there. but a lot of damage was done in the five-hour tantrum. >> some winners on the baseball feel will no longer get their just desserts. the baltimore orioles have banned the tradition of smashing a pie in a players face after wins. they say it's about safety and that pie smashing can be too dangerous. >> still ahead, the gymnast who

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>> glor: finally tonight, talk about gymnastics teams in many pictures something like ballet set to classical music by carter evans introduces us to a college gymnast stretching the limits to a different beat. >> gymnastics is all about grace. >> nice. >> reporter: power. and hip-hop? it's not just the high notes thatu cla gymnast sophina de jesus hits, it's those moves.

sport and what you did is very nontraditional. >> not traditional at all. >> reporter: she and her teammates are transforming the image of the sport says valerie cons dofield know in her 267 year as theu cla head gymnastics coach. >> i feel it is much more about entertainment now than about the rigid sport of perfection. >> reporter: sophina is getting high marks from judges. but even higher marks on social media. where her floor exercise earlier this month, the first time she ever performed it, went viral. >> i woke up and my mom called me and said oh, honey, did you know that you have like 5 million views on the floor routine, i didn't even know it was posted anywhere. >> reporter: it's now been viewed more than 40 million >> tell me about some of the responses you're getting. >> some of my favorite ones have been some marriage proposals and prom proposals. >> reporter: a lot of seg ep rites have taken note. >> yes, reese witherspoon. >> tweeted you.

really exciting. i found out that chris brown posted it on his facebook and i was like oh my gosh, no way, no way, no waym. >> even sophina's teammates have gotten into the proof. along with her coach who admits you can please a crowd but still not please everyone. >> i think there are judges that still don't like it. i've always just compared it to a picasso. a picasso is worth $30 million. but a lot of people would not put a picasso in their home because they don't like it. but that doesn't mean that it's not excellent art. >> reporter: sophina has danced professionally and says her future remains in dance. will you not find the nae nae, the whip and the dab this summer in rio but to the millions who have now viewed sophina's routine. >> that one performance that i did, it was like, that was my olympics. >> reporter: and a moment as good as gold. carter evans, cbs news, los angeles-- los angeles.

evening news tonight, later on cbs, "60 minutes" and first thing tomorrow, cbs this morning. i'm jeff glor in new york. good night . coming up at 5:00, a woman struck and killed by a car while walking on i-25. >> a police officer is killed on her first day on the job in virginia. the suspect's ties to the military. >> and how a local salon is giving back to denver's homeless community. >> taking a live look outside

aguilera is talking about a ,, all kinds of teams use slack to do amazing things. . new tonight, a woman was killed when she was hit by a car while walking along i-25. it happened early this morning in the northbound lane near johnstown. now investigators want to know what she was doing out on the road. good evening. i'm kathy walsh. >> and i'm tom mustin.