tonight, the dramatic split screen. president biden and former president donald trump making dueling visits to the border mr. biden and mr. trump separated by only about 300 miles along the texas border, clashing over immigration, an issue dominating the 2024 campaign the president slamming republicans for killing a bipartisan border bill. mr. trump blaming the crisis on the biden administration our team on the border also this evening, israeli troops accused of opening fire on a crowd waiting for aid in gaza and killing more than 100. israel disputing that, saying many were trampled while looting trucks all as gaza reaches a grim milestone an estimated 30,000 dead the wildfire raging in texas, now the largest in state history. more than 1 million acres burned we're in the fire zone the life-threatening winter storms slamming the west coast

blizzard warnings in california for up to ten feet of snow defense secretary lloyd austin on the hot seat the heated moments as house republicans grilled him on his secret hospitalization. the cheaper choice when it comes to popular weight loss drugs, but what are the health risks and our exclusive. nfl star damar hamlin after surviving that heart scare on the field. we're there as he surprises a teen athlete who shares a special bond >> announcer: this is "nbc nightly news" with lester holt >> good evening and welcome. the race for president still officially in its primary season leapfrogged straight into the issue at the heart of the 2024 race the two front-runners traveling to the southern border, making duelling appearances on what could be a defining battleground in this campaign president biden and former president trump each standing in the shadow of mexico today, separated from each other by hundreds

of miles, but exchanging salvos over an issue impacting more and more american cities on the border and beyond the president calling out house republicans for sinking a bipartisan border bill and extending an offer to mr. trump, saying, we can do it together. the former president blaming mr. biden for border chaos, calling it a joe biden invasion our gabe gutierrez has late details >> reporter: facing criticism over his handling of the immigration crisis, president biden making his second trip to the southern border while in office. >> it's real simple. it's time to act >> reporter: arriving in brownsville, texas, blasting house republicans for tanking a bipartisan border security bill at the urging of former president trump. >> it's the toughest set of border security reforms we've ever seen in this country it's time for the speakers and some of my republican friends in congress who are blocking this bill to show a little spine.

>> reporter: the president with this message directly for mr. trump. >> join me or i'll join you in telling the congress to pass this bipartisan border security bill. we can do it together. >> reporter: earlier, the republican front-runner landed about 300 miles away in eagle pass, texas >> this is a biden invasion over the past three years. >> reporter: arguing president biden could end the crisis on his own, slamming what he calls mr. biden's lax border policies for causing it >> so we had remain in mexico remember that? you can't come into our country. and we had no more catch and release. our catch and release, we released them in mexico >> reporter: mr. trump pointing to recent high profile crimes allegedly committed by migrants, including the murder of georgia nursing student laken riley. >> joe biden will never say laken riley's name, but we will say it and we'll remember it. we're not going forget her. >> reporter: an nbc news review of available crime data shows crime has dipped in cities that received the most migrants should president biden have gone to a different part of the border >> i believe so.

i think it probably would have been best to go that's very busy, like arizona or california >> reporter: a record 8.6 million migrants have crossed into the u.s. since president biden took office. the border patrol union telling us mr. biden should not have reversed trump border policy. >> they were very effective for us as border patrol agents in securing the border. >> reporter: an nbc news poll shows 57% of americans say mr. trump can best secure the border just 22% say biden will beyond the political split screen, desperate migrants in mexico wait to cross here in brownsville, monica from el salvador waits for a bus with her 3-year-old son she tells us the journey was hard, and that she spent four months waiting in mexico for an appointment for an initial asylum screening through an app on her phone now, she's off to meet family in houston, as the border battle in washington intensifies. >> and gabe, a win for the white house today

in its legal battle with texas regarding the border >> reporter: that's right, lester. today, a federal judge temporarily blocked the controversial law in texas that would have allowed local police to arrest migrants suspected of being in the state illegally. the governor says he will appeal, and the case could eventually make its way to the u.s. supreme court lester >> all right, gabe gutierrez, thank you a deadly incident today in northern gaza during a food distribution effort. but how it happened is in dispute tonight this as the health ministry now puts the gaza death toll from the war at over 30,000 raf sanchez has late details. >> reporter: tonight, bodies carried away on donkey carts after a deadly encounter while palestinians gathered to receive humanitarian aid but how it happens is in dispute our camera crew was there before 4:00 a.m. as hundreds of people came to the gaza coast waiting desperately for the delivery of food israel less military saying this drone footage was taken soon after, showing a crowd surging around aid trucks a palestinian eyewitness tells nbc news israeli forces

started firing at people gathering in front of a checkpoint before the trucks arrived, and kept shooting later as the crowd rushed towards the aid. the hamas-run health ministry says more than 100 people were killed, hospitals flooded with gunshot victims. but israel's military saying many died, not from israeli bullets, but in a stampede around the trucks. and that israeli troops only opened fire later at a specific group threatening their position do you have any evidence to support your claim that this crowd posed a threat to israeli troops? >> if you approach armed soldiers in a war zone and there is a threat and they fire warning shots in the air, the best thing to do is to turn around and walk away. >> reporter: and tonight, the u.n. warning that one in four gazans are just a step away from famine. moussa is 6 months old, barely older than

this war but in his tiny body, signs of a short life with little food in a sense, he is lucky. doctors say eight other children died this week from malnutrition and dehydration, all at this one hospital. not far away, sami al masri trying to feed her kids by frying pancakes out of barley feed meant for donkeys. her children dodging bullets to find firewood "words can't describe the tragedy we're living in," she says and president biden now says he no longer thinks a cease-fire by monday is likely lester >> all right, raf, thank you. here at home, that massive and deadly wildfire in texas became the biggest fire in the state's history today, burning more than 1 million acres. our guad venegas is there. >> reporter: tonight, the texas panhandle engulfed in a deadly ring of fire as firefighters race to beat back the flames of what is now the largest wildfire in the lone star state's history. the smokehouse creek is the biggest of four active wildfires ravaging the state it's already burned through more than

a million acres, leaving apocalyptic scenes like this in its wake entire neighborhoods reduced to rubble. for paul blankenship, home won't ever be the same the flames took his mother, joyce. >> they had already blocked the roads off, so, i wasn't able to get in there to her. >> reporter: the colossal blaze is just 3% contained today, a surreal scene in fritch, texas freezing temperatures led to a snow flurry coating the ashes. it's a help to firefighters still extinguishing hot spots, but the weather may not stay helpful for long >> it's basically a product of low relative humidity, dry fuel conditions, and really, really high winds. >> this was my art studio. >> reporter: it's already too late for melanie. her home is gone now, she's worried about the historic hotel she manages. >> i looked at my house, i said good-bye, and thank you, because i knew that i was not going to return. >> reporter: until the flames subside, the hotel is putting up fire crews and

evacuees for now, the fire rages across these vast farmlands, scorching crops and forcing some farms to release their cattle to escape the blaze. >> it's really going to hurt, and all the ranchers around it, it's going to be devastating for our community. >> reporter: with more high winds forecast in the coming days, this battle is far from over >> and guad, do firefighters have enough help or do they have to go outside to bring in more folks? >> reporter: well, lester, federal firefighters are on the way, and president biden says air tankers are also coming to texas to help fight this blaze there has been a break in the wind conditions giving firefighters that edge. but forecasters say the heavy winds are expected to come back over the weekend lester >> all right, guad, thank you. and in northern california tonight, blizzard warnings are in effect for the sierra nevada mountains, with heavy snow already creating chaos on some roads. 5 to 10 feet of snow possible by sunday, with wind gusts between 60 and 100 miles per hour travel will be

extremely dangerous, if not impossible. in alabama, state lawmakers passing new protections for ivf, after that state's supreme court decision that found frozen embryos are children sent shockwaves across the country. senior legal correspondent laura jarrett is here. laura, this would only be a temporary fix, if you will >> yes lester, lawmakers today acknowledged these bills are not a long-term solution instead, they're meant to shield ivf patients and doctors from civil suits during the course of fertility treatments where embryos could be damaged or destroyed the goal, of course, to give clinics in the state enough comfort to resume ivf procedures that have been on hold for more than a week. but the bills do not clarify whether the frozen embryos should be considered children, the crux of the state supreme court's ruling, potentially leaving a legal gray area. nevertheless, the governor is expected to sign the proposed legislation as soon as next week, lester. >> all right, thank you, laura just in tonight, a major turn in the case

of the air nationa guardsman accused of leaking pentagon secrets. jack teixeira is expected to change his plea to guilty, according to court papers teixeira, who was arrested last april, is accused of using his top secret clearance to access classified material and then posting it in a chat forum a combative hearing today in congress, where defense secretary lloyd austin was questioned about his recent hospitalization and failure to disclose it to the president and others for days courtney kube has more >> reporter: defense secretary lloyd austin in the hot seat today. >> it was a failure of leadership. >> reporter: house republicans grilling austin for not telling the white house he was diagnosed with prostate cancer, underwent surgery for it, and weeks later was hospitalized with serious complications. >> i find it very concerning that the secretary could be

hospitalized for three days without anyone else in the administration even noticing >> either the president is that aloof, or you are irrelevant which one is it, mr. secretary? >> it's neither. >> reporter: democrats were more forgiving. >> you want to know what accountability is accountability is having to come and sit in front of people and their outrage and their drama. >> reporter: the secretary emphasizing that someone was always in control. >> there was never a laps in authorities or command and control. >> reporter: but acknowledging a breakdown in the notification process. >> we did not handle this right, and i did not handle it right. >> reporter: although austin took responsibility, he also said he assumed his staff would manage it >> i never directed anyone to keep my hospitalization from the white house. >> reporter: on monday, the pentagon releasing a summary of a classified review that blamed the lack of notification in part on a lack of written guidance, but also on staff not wanting to pry into austin's health. the review recommending new procedures if any american worker did what you did, they would be fired >> reporter: and the questions still

remains. why did it take the pentagon three days to tell president biden his defense secretary was in intensive care? courtney kube, nbc news, the pentagon with just one day to go, the house passed a stopgap funding bill today to avert a partial government shutdown. the bill keeps much of the government open through next friday, and the rest open until march 22nd republicans and democrats are far apart on funding decisions for major departments like the pentagon and homeland security in 60 seconds, with the new class of weight loss drugs soaring in popularity, not everyone can get them and now more people are turning to an alternate option but is it safe we'll look at that, next

oprah winfrey announced she is stepping down from the board of weight watchers, after going public about using weight loss drugs. these medications are

wildly popular, though the cost has led many to seek out cheaper compounded versions. but are they safe? cnbc's melissa lee reports. >> you want to keep the same length? >> reporter: for new jersey hairstylist kelly fatigan, maintaining a healthy weight was never an issue, until she had a child. >> i had my son, and we all know after 30, things kind of start to change. >> reporter: she wanted to try ozempic, the diabetes medication that is also shown to be effective and popular for weight loss. >> but the reality was at $800 a month, it wasn't something that was sustainable for me >> reporter: when there's a nationwide shortage for a drug like ozempic's active ingredient semaglutide, the fda allows for what's known as compounding, the art of mixing in medications. >> i'm on my way right now get my first shot. >> reporter: she was able to get her hands on compounded semaglutide, first from a local med spa for $300 a vial, then an online site she loads the syringes

herself. >> i was just told to sanitize the top of it each time. >> pull back a little bit. >> reporter: robin wagner is a professor at the uconn school of pharmacy and teaches proper compounding techniques >> when there's a need and there is a profit, people will get involved in compounding. >> reporter: dozens of compounding pharmacies across the country are mixing their own versions of compounded semaglutide. and while some of the facilities are inspected by the fda, the drugs they make are not. the agency has issued warnings that compounded versions of semaglutide may carry more risk and negative side effects >> the big issues with obtaining compounded semaglutide is i don't know where these molecules are coming from i don't know how pure they are what else is being added? >> reporter: social media sites like tiktok are flooded with influencers plugging promotions for various compounded medications. >> i do have a discount code.

>> you're going to use my code, lauren50. >> reporter: our team wanted to see how easy it was to get compound semaglutide. we tried eight different telehealth sites that didn't require any blood work using our real health information, we shouldn't have been approved, and all but two sites did turn us down but with one, after a quick consult with a doctor -- i'm qualified. okay, five questions, and that's it. great. >> this nausea kind of sucks. >> reporter: kelly has documented her experience on tiktok and is now sponsored by a telehealth company. she says she's comfortable with the choice she's made. >> i feel like when you feel like you have no other options, you jump for it and do what's necessary. >> reporter: for her, the reward outweighing the risk for nbc news, melissa lee, new york. >> and for more, watch "big shot: the ozempic revolution" tonight at 10:00 p.m. eastern on cnbc up next for us, as electric cars made in china boom in

popularity, the white house announces an investigation into whether they're compromising drivers' data

"overflowing with ideas and energy." that's the san francisco chronicle endorsing democrat katie porter for senate over all other options. porter is "easily the most impressive candidate." "known for her grilling of corporate executives." with "deep policy knowledge." katie porter's housing plan has "bipartisan-friendly ideas to bring homebuilding costs down." and the chronicle praises "her ideas to end soft corruption in politics." let's shake up the senate. with democrat katie porter. i'm katie porter and i approve this message. the biden administration is taking a major step toward blocking smart cars made in china from roads here in the u.s., citing a possible threat to national security. we get more from andrea mitchell. >> reporter: tonight, the u.s. raising alarms about chinese smart cars, fearful beijing could use its software to spy on american drivers >> it's like an iphone

on wheels. >> reporter: citing national security, commerce secretary gina raimondo is launching an investigation into the threat >> the car knows your location it knows your patterns, everywhere you're going, your routes it's a huge amount of information. >> reporter: would you go so far as to ban their technology >> it depends. it depends what we learn. >> reporter: do you have that authority? >> yes, yes. we can do everything from mitigating all the way to banning. >> reporter: china's foreign ministry says that would overstretch the concept of national security. as china's ev sales are booming, one of its companies has now passed tesla as the world's biggest seller but china faces steep tariffs trying to sell in the u.s., which has it looking to mexico. >> if china can set up fil assembly plants in mexico, it can then export those vehicles to the united states for far lower costs, and that gives them equal footing in terms of the u.s. market >> reporter: or even an advantage chinese carmakers get

government subsidies and easier access to key battery materials. that helps them sell evs for thousands less than those made by american companies it's not a cover for trade sanctions and protectionism? >> no. >> reporter: in the guise of national security >> no, this isn't that this is national security, protecting americans. >> reporter: so they know who's tracking them when they get behind the wheel andrea mitchell, nbc news, washington and next for us tonight, our exclusive. the nfl's damar hamlin's tender-hearted surprise visit to a young athlete.

finally, our "nightly news" exclusive. the nfl's damar hamlin and his surprise for a young athlete. priscilla thompson on the heartfelt connection they share. >> reporter: zeke menkins had big dreams of becoming a military pilot and playing football but around sixth grade, that all changed. >> it hurt to breathe. it hurt to sleep >> reporter: the cause, a leaky heart valve that would have to be replaced with a mechanical one what went through your minds in that moment >> i just kind of thought, his world is going to come crashing down. >> reporter: on blood thinners for life, zeke's football dreams were over. when they told you you weren't going to be able to play football again, what was that like for you >> probably one of the most devastating moments of my life. >> reporter: devastated, but not defeated

now 16, zeke is a track star, with new passions lik marching band and choir, and dreams of becoming an airline pilot. his story inspiring someone else so how you feeling about this surprise? >> i'm feeling super excited. >> reporter: buffalo bills safety damar hamlin suffered cardiac arrest on the field last year. >> i'm super proud of him, of being able to shift gears and still, you know, display your passion for other things that you love in the world where's zeke >> reporter: hamlin inviting zeke to join abbott's heartmates team >> you're our first pick in the draft, so there you go >> reporter: for those impacted by heart conditions. >> it's just a community that we built to allow people to know that you're not alone. >> reporter: did you experience any of that loneliness or isolation? >> yeah. i still do it's something ongoing. >> reporter: a life-long journey of healing hearts priscilla thompson, nbc news, midlothian, texas. >> what a great moment glad we could share it that's "nightly news" for this thursday

thank you for watching i'm lester holt. please take care of yourself and each other. good night

right now on nbc bay area news, tonight the rain is here and we're tracking when the heaviest rain will roll in tonight. plus, life-threatening conditions in the sierra. >> your lives are way more important. >> tahoe getting hit with a blizzard. we'll check in with our snow expert who's already in that area. then does san francisco have a drug probl a