conversations going? can this make a difference? >> i believe it can. it is a difficult conversation. but a much needed conversation. i think that what they are doing with this conversation here is, again, letting folks know each us as surgeons treating the folks coming to this trauma room we still understand what's going on out there in the streets. we need to make sure that we pay attention and america still pays attention to what's going on to the officers and those who are not officers as well. >> robert morris, thank you for being our guest. thomas, a big part of that conversation, as you know, will start tomorrow. you mentioned it, not only president obama, vice president biden, president george bush will be here. having talked to so many people here over the last several days, they are looking to our president to be the consoler in chief and to set the tone for this conversation going forward. thomas?

>> chris jansing in dallas for us, thank you. tonight there's a vigil before the president gets there at 8:00 p.m. at the dallas city hall blaz is a. the president, vice president, george bush all there tomorrow in it dallas. we continue our coverage now. kate snow picks things up. and good afternoon, what does rb mean? the shooter in dallas wrote those initials on a parking gradual in his own blood before police killed him. that's just one piece of the constantly evolving puzzle of the ambush on dallas police officers last week. today the dallas police chief outlined what we know and what we don't. let's start with gabe gutierrez who has the latest. quite a press conference from the mayor. outline for us where we're at this afternoon. >> reporter: good afternoon, as you mentioned a wide ranging press conference where the police chief described exactly how massive this investigation

is. they are going through more than 300 witness statements, 170 hours of body cam footage and surveillance footage from the 20-square block crime scene. chief brown said that this was a gunman who knew what he was doing. he had amasked a large stockpile of weapons and bomb making materials in two-story home he shared with his mother. i asked how it was possible someone inside that house would not have realized that he had so much material and he may have been planning a larger attack. he said that's a question he has as well. he said mya johnson micah johns johnson's mother has been interviewed. his participanents said micah w disappointed with his military service. he was sent home from afghanistan, according to his lawyer who says he represented

him. that lawyer says that johnson was accused of sexual harassment. he came back to the united states. his parents say after that he started studying black history and his father broke down in tears in that interview talking about how he could not imagine that his son had done this. also in this news conference, chief brown talked a lot about the strain this has placed not just on the dallas police department but also police officers throughout the country. he says that we are asking our police officers to do too much. he also spoke about the question about open carry laws. they have them in many states. here in texas it started this year. he was asked about what about the people that showed up to this rally, this protest march carrying long guns as part of the protest. here's what he had to say about that. take a listen. >> it's increasingly challenging when people have ar-15s slung over and shootings occur in a

crowd and they begin running and we don't know if they are the shooter or they begin has been the presumption that a good guy with a gun is the best way to resolve some of these things. we don't know who the good guy is versus who the bad guy is if everybody starts shooting. we have expressed that concern as well. i have belief and trust that our folks are listening at the state on this issue. particularly as itnvves protests. >> chief brown also defended his decision to use a bomb delivered by a robot to take out the gunman. he revealed new details about that robot. he said it was purchased in 2008 at a cost of $151,000. he said that the robot was damaged, but still functional. he said this wasn't an ethical dilemma. he said he would do it again because the gunman was intent on killing police officers and had already done so.

>> gabe, we mentioned the details about the killer writing these initials on the wall. any other clues about what that is? >> reporter: certainly, there's a a report out this morning from "the daily beast" that claimed that the gunman micah johnson may have been blacklisted by several black power organizations. i asked the chief about that report. he said at this point he could not confirm that that had anything to do with this. the reason that's important is that the initials rbg is an ak nism used by the black riders. there was speculation that was what micah johnson was trying to write on the walls of that area where he was locked in negotiations with police. the chief, again, has not confirmed that. he said investigators are looking through all these digital trails, through journals, interactions he may have had to try to determine that chilling mystery. what were those letters?

>> gabe gutierrez, thank you so much. we're also hearing now for the first time from the parents of the shooter in dallas, who sat down with the blaze. they noticed a change in his behavior after he was discharged from the u.s. army in 2015. his mother describing him as a hermit. johnson's father broke down during that interview. >> i don't know what to say to anybody to make anything better. i didn't see it coming. >> he was a good son. >> i love my son with all my heart. i hate what he did. >> did he ever talk about any of his experiences in the military that maybe made you question

that something happened? was it the war? >> i don't remember anything. >> i don't remember anything about it. the military was not what micah thought it would be. >> micah johnson's parents speaking to the blaze. the other story continuing to draw protest over the weekend is the deadly police shooting of fi lando cast teal over the weekend. and 21 officers injured as d demonstrations in some parts brought part of interstate 94 to a standstill for more than five hours. blake mccoy remains in st. paul following this story for us. >> reporter: the city attorney here in st. paul is currently weighing whether to charge those protesters who shut down the interstate. in total there were 102 protesters arrested here in st. paul. 50 of them on that freeway. the city attorney has until 10:00 tonight to decide whether

to charge the protesters or release them. if they are charged, they are facing third degree riot charges, which is a misdemeanor charge. the mother of her son who was shot prompted all these protests condemned them saying when demonstrations become violent it disrespects my son and his memory. he was a man of peace and dignity. 21 officers were injured during the protest as they hurled objects ranging from rocks to bottles to firework and molotav cocktail. we have just learned in the last hour that the family has retained a lawyer glen da hatchet. if that name sounds familiar, she's a former tv judge. she currently practices law out of atlanta and is on her way here. the family and that attorney are planning a press conference for tomorrow morning. >> we hear music behind you. any demonstrations planned for later today or tonight? >> reporter: no more marches or

rallies planned. this is the governor's mansion where people have been encamped since that shooting last wednesday. this has been a rallying point since that shooting last wednesday, but has turned sbo an encampment over the last 48 hours. tents now and even generators. there's an iphone charging station for people coming out here to protest. so while wer not expecting any marches, we do expect this to continue. there's no end in sight here at the governor's mansion. >> blake mccoy, thank you so much. demonstrators took to the streets over the weekend in baton rouge, louisiana, to protest the shooting there of alton sterling. while many of those were peaceful, on sunday dozens were arrested as police in riot gear stared down 100 demonstrators trying to shut down a highway there. late saturday more than 100 others had been arrested including prominent black lives matter activist. he was released on bond

yesterday. sa sara is there for us. >> reporter: this afternoon the district attorney of the local parish here has recused himself from this case citing a professional relationship with one of the parents of one of the officers involved in this case. now this follows a night of more protests, more arrests and police wearing gas masks. that's the first time we have seen that, although no tear gas was fired. now we know of at least 50 people who were arrested overnight. that number was provided relatively early in the evening. we do expect to see it go up. state representative ted james grew up in this neighborhood. he now represents it. he spoke to us about his reaction to the events of the past few days. >> there's 10% on each side and we can weed that out from the protesters and 10% of the law enforcement officers that are

purposeliage tagt, we could keep the peace here. >> reporter: he feels some of the police have been purposefully agitating protesters. we have heard that from those arrested over the weekend. the governor of the state describes the police's response as moderate. he's praised both them and the protesters. he says the majority of them have been peaceful. you can hear this rally here behind me, this vigil demonstrators singing "amazing grace" at this demonstration here this afternoon. back to you. >> okay, thank you so much. governor chris christie hitting the trail today with donald trump just one week from the convention. is trump any closer to choosing a running mate? also senator bernie sanders joining hillary clinton in new hampshire tomorrow. what role could sanders play in the campaign moving forward? stay with us for that.

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we must maintain law and order at the highest level or we will cease to have a country 100% we will cease to have a country. i am the law and order candidate. >> that was donald trump just a short time ago in virginia beach. trump made the trip with new jersey governor chris christie as speculation explodes over who the vice presidential pick will be. peter alexander join mess now. we love this tough. one week until the gop c convention. chris christie is with him today. mike pence with him tomorrow. any leaders in the clubhouse? >> we know this is decision week heading into next week's convention to take place in

cleveland right now. obviously, when it comes to donald trump, only donald trump knows what he's thinking. the best indications that he communicated again today is he has five candidates in mind. among them one of the latest contenders is this retired army general mike flynn. he's a registered democrat. he would bring national security expertise, but he also in an interview this weekend cast himself as a pro choice candidate here. today he tried to change that position. he said that he is a pro life democrat. he says people are going to decide the election on abortion issue, they should just stay home. so a 180 on that issue. we'll see how that plays for donald trump. the other names is mike pence, the indiana governor, who is expected to be with donald trump when trump heads to indiana tomorrow. chris christie, who shared the stage with him today. newt gingrich has been a name that's attractive to donald

trump through the course of that campaign. who the fifth name is not entirely clear. mary fallon is the governor of oklahoma. she hasn't handed any paperwork or been in conversations in terms of being vetted. that's where things stand. a lot of the sources giving different information but sounding like mike pence is very high up on that list. in order to determine where his name is, you can't be up for governor and vp. so for his sake, he needs to find out soon. >> the reason you're saying five is because donald trump said to "the washington post" today five on his list, right? >> that's exactly right. that's what he said to "the washington post" out of his own mouth earlier today. he said i do like the military, but i'm leaning toward the political, which is why most people don't think it would be the retired general but more likely a political candidate. >> especially some of what he said on the sunday shows. some conservatives saying that's

not going to fly. >> already there are people saying it's disqualified him from conversatisideration. >> let's go to the democrats on the eve of what could be a major moment for party unification. kristen welker is here with me now. how certain are we that sanders is going to actually endorse hillary clinton tomorrow? >> that is what is expected. that's what we're hearing from all of our sources. and this is a major moment for party unity. it's been almost a month since they had that high stakes meeting in washington, d.c. we all thought it was going to concede and endorse her in the days after that meeting. it didn't happen. he wanted to have an impact over the platform and that's effective effectively what has happened over the weekend hillary clinton and the democrats agreed to sort of come to his terms on issues like health care including a public option, education reform and the big one for senator sanders the $15 an hour minimum

wage. he didn't win what he wanted on trade, but he has a lot of wins in his column. so he's feeling like he can go back to his supporters and say we really fought for something and got something tangible, so that's why he's poised to endorse her tomorrow. she's already been endorsed by senator warren and president obama. there are still some sanders supporters who say they are not ready to get on board. that's why he's going to be so pivotal. >> we'll see what happens tomorrow. a programming note in just about an hour, lester holt will be speaking with vice president biden. you can watch that interview at 4:30 eastern right here on msnbc. now to some breaking news that we're hearing about. cal perry is with us with reports, i want to be careful ant this, reports there may have been a shooting at a courthouse in michigan. >> this is coming out of the town of st. josephs. it's half an hour to the west of kalamazoo.

not only the michigan state police, but local authorities are responding to shots fired in this courthouse. the reports are, at least the phone calls coming from inside the courthouse, would indicate shots were fired on the third floor. but what we know now is the area is being sealed off. they are assuming that this is an active shooter situation. this just happened about 45 minutes ago. and michigan state police were the first on the scene. i can also confirm that courthouse is being evacuated right now. >> cal perry with breaking news. we'll keep an eye on that and monitor that. no word yet on what kind of size or what kind of degree that shooting might have been. we'll keep an eye on that and take a quick break. from over 30 billion connected devices. just 30 billion? a bold group of researchers and computer scientists in silicon valley, had a breakthrough they called... the machine. it changed computing forever. and it's been part of every new technology for the last 250 years.

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its unique formula supports immune health in two ways. with probiotics that work in your gut. and antioxidants that work throughout your body. trubiotics from one a day. i drive to the hoop. i drive a racecar. i have a driver. his name is carl. but that's not what we all have in common. we talked to our doctors about treatment with xarelto®. xarelto® is proven to treat and help reduce the risk of dvt and pe blood clots. xarelto® is also proven to reduce the risk of stroke in people with afib, not caused by a heart valve problem. for people with afib currently well managed on warfarin, there is limited information on how xarelto® and warfarin compare in reducing the risk of stroke. you know, taking warfarin, i had to deal with that blood testing routine. i couldn't have a healthy salad whenever i wanted. i found another way. yeah, treatment with xarelto®. hey, safety first. like all blood thinners, don't stop taking xarelto® without talking to your doctor, as this may increase your risk of a blood clot or stroke. while taking, you may bruise more easily and it may take longer for bleeding to stop. xarelto® may increase your risk of bleeding if you take certain medicines. xarelto® can cause serious and in rare cases,

fatal bleeding. get help right away for unexpected bleeding, unusual bruising, or tingling. if you have had spinal anesthesia while on xarelto®, watch for back pain or any nerve or muscle related signs or symptoms. do not take xarelto® if you have an artificial heart valve or abnormal bleeding. tell your doctor before all planned medical or dental procedures. before starting xarelto®, tell your doctor about any kidney, liver, or bleeding problems. xarelto® is the number one prescribed blood thinner in its class. well that calls for a round of kevin nealons. make mine an arnold palmer. same here. with xarelto® there is no regular blood monitoring and no known dietary restrictions. treatment with xarelto® was the right move for us. ask your doctor about xarelto®. let's go back to that breaking news we were mentioning before the break. a shooting confirmed at a courthouse. let's go to cal perry for the latest. you're seeing at least one tweet about this. >> our affiliate based out of

south bend, indiana, about 45 minutes to the south of where this is happening, has put out a tweet confirming that the sheriff is confirming there has been a shooting at the courthouse, but the good news is the scene is secure. so michigan state police are on the scene. so are the local authorities there. the situation is secure. we're still waiting for any numbers of potentially wounded from that shooting. we don't have that information yet. what e we know is there's been a shooting at this courthouse. fushls have shut down and secured the area chr, which is news. >> we don't know whether anyone was injured. >> we don't. we're certainly not ready to confirm any reports. >> keep an eye on that for us. let's move on to diamond reynolds, the girlfriend of the man shot and killed during a traffic stop in minnesota.

she spoke to tamron hall earlier today. >> what have you told your daughter? >> that mommy loves her, phil loves her and we're going to continue to protect her beyond a shadow of a doubt. and we're going to get through this. no justice, no peace, prosecute the police. that was one of her favorite sayings. even her being around for these things, it hurts, but we're makes history. phil is going to make history. we're going to get our justice. >> diamond reynolds, the effect this is having on children. i'm joined by the national reporter for "the new york times." she wrote about this very topic this weekend. thanks for being with us. i have to say i was in tears reading your article. it's a tragic catalog of what's happening in this country. the children left behind by some of the shootings recently.

i want to read a brief portion of your piece. you write is again and again, children are finding themselves meshed in the royaling debate over police treatment of african-americans. the close up views of violence traumatizing are giving riot to a generation of young people who distrust authority, grow up well before their time and suffer nightmares that seem too real. is that what worries the people that you talk to that we're creating another generation of distrust? >> that is what is worrying people. i talk to family members affected by officer-involved shootings. tamir rice's daughter lost 50 pounds after she witnessed her brother getting short. officer grant in california, his daughter was ducking from police at 5 years old. and their grandmother told me

it's cute when you look at a kid saying she doesn't understand, but they are carrying this very adult pain and their parents are really worried. i talked to so many families that they are going to have these children that are going to be afraid for the rest of their lives. >> they were describing to you panic attacks, nightmares, how common was that story? did everyone have a story like that? >> everyone i talked to had a story of emotional distress of some sort of depression. it all took different forms. it talked a little bit about him. instead of duck iing for police which she's doing is when she gets to the car with her participant parents, she's saying we need to get gas. i don't want to get pulled over. some kids are writing poems. i talked to a family in chicago.

her nephews made up a song. then they were looking for video cameras and singing why did they kill my aunt. she was a good lady. it's a sad case. i think even the families involved don't understand how a 4-year-old or 5-year-old can understand a lot in and can already start fearing the police. >> it's not just the children of people killed by police, but you also write about the children of the police officers in dallas. the life partner of one of the officers, the mother of his children to walk her down the aisle. my son will not have his best buddy to play football and baseball with. it's hard for me to read that as a parent. this is hitting everybody. >> it's hitting everybody. i wanted to get an idea while we're talking about a lot of police-involved shootings, these

officers and family members are going to be reeling. you read the piece from the widow of the officers talking about how her daughters are going to have lasting impacts. they are going to be graduating. they are going to be thinking they are going to have their father. i also wrote about a woman in the protest area in dallas and she was a protester. she had to duck and cover her son with her body and was able and got a bullet because of that. and as a result you even had ro testers who were not targeted by this gunman, but were also going to have that. you think about all the children in dallas. even the ones that with respect shot, even the parents were able to get them home safely, it's such a heartbreaking situation. >> thank you so much for bringing that to us. i think it's so important to remember those stories and remember what's happening. we have been talking so much about the outcry over these deaths and people protesting and showing up to protest the police shootings across the country.

calling for changes in policing practices nationwide. for more, i want to bring in rash rashad robinson, thank you for being here with us. appreciate it. >> thanks for having me. >> let's talk about this week, this difficult week we're all living through in the wake of the protests and tragedy in dallas. your group is focused on solutions to everything i was just talking about. where do you begin? >> we have been showing up for years when police officers and community have not been able to come together. when black people have been put in harm's way by police. we haven't had solutions where there's been no accountability. over the years we have tried to work on a number of different solutions. i testified in front of the president's commission for 21st century policing. i went to that meeting with civil rights leaders in february to meet with the president. right now we're going to be calling on the federal government to put their money where their mouth is.

millions of dollars going to local law enforcement every single year and those dollars have to start meaning something. those dollars have to start being pulled back. if police forces are not going to do the type of things to put in place real reform, over $3 million in the last five years went to the police department. even while under civil rights investigations. what happens if we actually change the incentive structure behind that money? >> you're saying don't give federal dollars to departments that aren't achieving certain goals? >> it seems simple but it's a way to change the structures behi behind. actually prosecuting cops when they are ding stuff wrong. >> they would say the police chief in dallas said a couple hours ago, look, we're doing our best. and people are pouring into the streets and becoming violent in some cases. how do you channel that anger

into something useful? are you concerned that it's muddying your message. ? >> for people who are watching, for everyday people who are sitting at home and saying what can we do and concentrating on the response of people to what's been happening for generations in terms of police abuse and not actually figuring out how we can solve it, they are concentrating on the wrong thing. we have an opportunity as more and more americans are seeing the challenges we have with policing. as we're e seeing more good police step up and say there are problems, that we actually put forward solutions, so for the police officers who actually want some change here, they can stand with us and actually push for the type of reform that holds bad police officers and bad departments accountable. until we have stmic change, we're going to continue to be in the situation. we're going to look back five years and tennessee years if now. we're going to be asking for more presidential commissions.

we're going to be asking for more solutions. we need to have more national conversations on race. when actually what we need is public policy. we need culture change. we need accountability. those are the things that we actually need from our government in this situation. >> interesting to talk to you. thank you so much for being here. appreciate it. much more ahead on the investigation into the dallas massacre. the officer who ran the command post and the hours following that ambush is going to share what he witnessed that night. stay with us. clean food. words panera lives by. no artificial flavors, preservatives, sweeteners. no colors from artificial sources. 100% of our food will be clean by year's end. that's food as it should be. ♪ burning of diabetic nerve pain, these feet learned the horn from my dad and played gigs from new york to miami. but i couldn't bear my diabetic nerve pain any longer. so i talked to my doctor and he prescribed lyrica. lyrica may cause serious allergic reactions or suicidal thoughts or actions. tell your doctor right away

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>> that was dallas police chief david brown providing an update on the number of cops injured and killed in the attack. the investigation into thursday's sniper attack is a huge one. detectives are reviewing over 300 statements to determine which witnesses and officers need to be brought back for further interviews. they also are reviewing 170 hours of police body camera footage. during his press conference, chief brown also said overall crime right now in dallas is at a 50-year low. one of the many dallas police officers who responded in a flash last thursday night was major max garn, who wrote about his experience and joins me now. thank you for being with us. >> thank you for having me. >> i want to start where you started. you write about i think you were at home eating dinner and someone sends you a message. you hear that something is happening and you rush down there. you ended uptaking over the

command post and working for the next 12 hours at least. what was that experience like? can you paint us a picture? >> it was somewhat surreal. we had news feeds and information coming over the radio. a confusing situation that we were doing our best to try to sort out. but i'll emphasize my role in the entire event was inconsequential to the sacrifice that the officers who gave their lives and those that tried to save them made. >> i understand that. i know that you knew se of those officers and knew some of the people that were hearing radio calls. >> it was out of that experience of the trauma and the witnessing of the cell phone video i intended to start this out as a therapeutic u way of riding out and putting words to my feelings

and sharing that as a secondary thought. >> can you describe the feelings for those who haven't read your piece? >> i wasn't sleeping very well. friday i turned right around and came back like so many others. i'd been up for 27 hours and got a few hours sleep. when i went to bed i was having visions of the offer that was killed and ambushed that originally we all believed was a different officer. out of respect for the family i'll not go sbo any other details. but trying to process all that, i was talking with a close friend and the words of a mentor in my adviser to start writing. i grabbed the laptop and sat down and it flowed out. it helped me to categorize and

put those words to my feelings. >> the chief talked earlier at length about his family getting death threats. he talked about the need for all of his officers to maybe get some help, get some counselling. how has it been getting back to work. how are you coping? >> i'm doing fairly well i would say. it was important for me to come in on friday and i met with my deputy chief. we made our third watch detail meeting and these were officers that responded the night before. and i relayed tthem atory from an incident in 1996 that i write about. it was traumatic for me where a senior officer stopped me in the hall and commiserated and talked about a shared experience and how that helped more than seeing a psychologist. it was that peer to peer counselling that we have a robust system for here in the department. i'm so thankful for that.

i wanted to encourage officers to avail themselves to that. police suicide is too high in this country. i couldn't bear the thought of any of my officers having to deal with that without feeling like they had somewhere to go and talk to. >> major max, i would encourage everyone to read your piece. it's quite a read. we'll put up a link on my twitter page. thank you for being with us. appreciate it. >> it was my honor. thank you. we're going to turn back to the breaking news coming out of michigan. cal perry has been following this. i hate that we're having to talk about yet another shooting. this is a shooting at a courthouse in st. joseph, michigan. what more do we know? >> this is a small town right on lake michigan. we have some pictures coming from our affiliate out of south bend, indiana. they have made it to the scene. this courthouse has been secure. we have heard that also from the governor of michigan who has put out a tweet et letting everyone

know that the courthouse is secure. an hour ago at about 2:30 our time. on the third floor of that courthouse that went into an immediate lockdown, people sheltered in place. those evacuated were evacuated and now we're waiting on information on potential casualties in which we don't have. >> i'm seeing from our local station in michigan that a press release or some kind of information may be coming around 4:00. >> we think top of the hour we should have some kind of official word. the first people to respond were the michigan state police. that gives you an idea it is a serious situation. there were shots fired. we hope we'll hear officially some word at the top of the hour. >> hopefully good news. thank you. president obama back home after cutting his trip to europe short. he flies to dallas tomorrow to honor the five slain officers. we'll talk to a congresswoman from dallas who will be flying to texas with the president. stay with us. . alife. it's really different. see? it's flexible...

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caught us off guard there. the republican platform committee meeting in cleveland to hammer out the policies the party will run ahead of next week's convention. ab sent from the proceedings, the two prior republican presidents george bush also absent next week is jeb bush. one of the first to lose to donald trump in the primaries. political analyst and former communications director to president george w. bush nicole wallace spoke with jeb bush in maine about donald trump. >> trump to his credit was very smart at exploiting these kind of opportunities. he's a master at understanding how the media works. more than anybody i have seen in politics. kudos for him creating the environment and then anticipating the environment to his effect. the tragedy of this is that

there isn't going to be a wall built. and mexico is not going to pay for it. none of that -- this is all like an alternative universe that he created. the reality is that's not going to happen. people are going to be frustrated and the divides will grow in our country. this country is still the greatest country in the face of the earth will continue to stagger instead of soar. and that's the heartbreaking part of this. i think people are going to really feel betrayed. >> nicole wept on to ask what he could have done differently during the primaries. >> looking back, i'm not sure what i could have done. having a conservative record, offering conservative solutions, hopefully giving people a sense i could have done the job wasn't enough. it might not have ever been enough given the circumstances. so look, kudos for trump for winning the nomination. it was extraordinary.

you can't take that away from him. he's the presumptive nominee. and he earned it. now he needs to run for president. there's a difference. we'll see how that works. >> fascinating conversation. you can see the whole thing, the full interview with jeb bush tonight at 10:00 p.m. we'll be right back. i like the bride more than the groom. ♪ turquoise dresses... so excited. did all her exes get invited? no ones got moves like uncle joe. ♪ when it's go book on choicehotels.com for instant rewards like gift cards, plus savings of up to 20%. book direct at choicehotels.com does your makeup remover every kiss-proof,ff? cry-proof, stay-proof look? neutrogena® makeup remover does. it erases 99% of your most stubborn makeup with one towelette.

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tomorrow i will chair my last cabinet meeting. on wednesday, i will attend the house of commons for prime minister's questions, and then after that, i expect to go and offer my resignation so we'll have a new prime minister in that building behind me by wednesday evening. >> british prime minister david cameron announcing he will step down on wednesday. that announcement today came less than a month after the vote to leave the european union. theresa may is expected to replace cameron as conservative leader and prime minister. nbc's matt bradley is in london following these developments for

us. matt, we've had so much news happening domestically, we haven't been paying as much attention to europe, but we should be. >> britain is making history yet again this week. a few weeks ooh britons voted to leave the european union. now they're about to get their second female prime minister in history. theresa may moves into the famous house at 10 downing street on wednesday where you saw david cameron speaking just then. that's after she goes to buckingham palace to kiss the hand of the queen. and that gesture marks her formal arrival into office. she'll be the 13th prime minister to serve under queen elizabeth ii. and her rise this week ends one of the most tumultuous periods in british politics in a generation. last month, britons voted by a very narrow margin to leave the european union. they called it the brexit, the british exit, n the surprise result sent markets tumbling. the british pound sunk and prime minister david cameron as you just see, re-signed.

here's an irony. theresa may had quietly supported staying in the european union. and today, she told a very nervous british public that she would stand behind the brexit, regardless of her previous views. >> the need of course to negotiate the best deal for britain in leaving the eu and to forge a new role for ourselves in the world. brexit means brexit, and we are going to make a success of it. >> at 59, theresa may is an old hand from the ruling conservative party. she's been in parliament since 1997. she's been home secretary which is sort of like the secretary of interior, since 2010. one of the longest serving in history. and she's in favor of gay marriage, against immigration and known for her create uf and flashy footswear. she's also compared to the former prime minister margaret thatcher, the original iron lady. now theresa may will have to

navigate some very treacherous political waters, negotiating the european union for a brexit that she never supported while still safeguarding britain's economy from even more damage. kate? >> matt bradley in london following all of that. so interesting. thank you. we'll take a quick break right now. still following those developing stories in st. joseph, michigan. more on that just ahead. it's time forry the "your business" entrepreneur of the week. rebecca barlow was running a nanny company when her husband of 13 years suddenly passed away. leaving her to manage his failing water damage business acme flood. she rebuilt the company from scratch, which is now grossing more than $2 million a year. for more watch "your business" sunday mornings at 7:30 on msnbc. 80% of women say a healthy lifestyle is a priority. but up to 90% fall short in getting key nutrients from food alone. let's do more. add one a day women's 50+ complete multivitamin.

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we were initially told we'd hear something at the top of the hour. unclear if that's going to still go on. one of the big questions is, if there was a shooting and it occurred inside, which we understand it happened on the third floor, how did someone get a weapon into that building, or were they able to get one already inside the building. certainly only sheriff's deputies or sheriffs should be carrying weapons inside this courthouse. that's going to be a big question for the authorities to answer. >> so far our local station as you say, cal, saying that the courthouse is now secure, meaning that there's nobody shooting at this moment, but we're hoping to get an update from officials, maybe as soon as a couple of minutes from now. >> initially went into an active shooter situation which is, at protocol, would have expected. people were told to shelter in place while anyone who could be evacuated was evacuated. we heard from the governor that that location, that courthouse in st. joseph, michigan, is now secure, and we're just waiting for a number of casualties. we know according to the

"detroit free press" there are some casualties. we just don't know how many, kate. >> okay. cal perry, again, we're watching very new reports just in the last hour and a half out of st. joseph, michigan, berrien county and reports of shots fired at the courthouse. unclear how many people may have been affected. we'll keep a close eye on that as i turn things over. that's going to wrap up my hour. i'm going to turn it over to steve kornacki. all right. thank you for that, kate. we are continuing to monitor that situation in berrien county, michigan.that incident at the courthouse in st. joseph. possible press conference. more details we're sifting through. any new developments we learn, any announcement from authorities, we'll bring it to you as soon as it happens. we're going to keep monitoring that situation. while we do, we're going to get you up to speed on what else is happening in the world of politics today.

120 days away from the election. topping that agenda this hourk it's a short list and a flip-flop. donald trump saying now that he has narrowed his list to five for the vice presidency on his ticket. that list including a registered democrat who said over the weekend this about abortion. >> i think women have to be able to choose what they -- you know, sort of a right of choice. >> some conservatives up in arms over that's from lieutenant general michael flynn, the vp hopeful, already trying to walk those comments back today. did he just write himself off the short list. and who else is left on that list? some new developments to tell you about ahead. also on the agenda, the nation still grieving over and grapple with the attack in dallas that killed five police officers. investigators now saying the shooter may have had plans for an even bigger attack, while the