i'm margaret brennan in washington. this week on "face the nation," another weekend rocked by gun violence. at america's southern border, preparations are under way for a migration surge that may strain resources and ignite political tension. gunfire and panic at an outlet mall just outside of dallas, as another gunman opens fire and once again an american community is the target of a mass shooter. we'll have the latest. plus, with pandemic-era border restrictions under title 42 set to expire thursday, once again our southern border braces for an influx of migrants seek a

better life in america. they're sounding the alarm about the likely humanitarian crisis. >> if all the numbers of migrants are transferred here like planned, it will be devastate. >> we'll ask homeland security secretary alejandro mayorkas about the security challenges we're facing in the u.s. a rare conversation with arizona's independent senator kyrsten sinema, who says the biden administration had two years to prepare for the migrant surge and did not do so. >> have you talked to the white house directly about this? >> yes, i have. >> what's the response? >> it has not been adequate. >> do you care to he elaborate? >> i do not. >> as the u.s. barrels towards potential default on its debt president biden will sit down with congressional leaders tuesday to negotiate lifting the debt ceiling. we'll discuss that and the concerns about stability in america's banking system with the chairman of the house financial services committee, patrick mchenry.

then, the north carolina republican legislature passes new restrictions on abortion. can the democratic governor roy cooper stop it from becoming law? we'll ask him. it's all just ahead on "face the nation." good morning and welcome to "face the nation." we have a lot to get to this morning, including that migrant surge expected at the border, but we're going to begin another sunday with news of gun violence shattering several communities across the country yesterday. the deadliest toll was taken in the suburb about 25 miles north of dallas. cbs news correspondent omar vill fran ka is on the scene. >> margaret, just after 3:30 yesterday afternoon there was mayhem and carnage at this armo opened fire killing eight

people and injuring seven others before police finally shot and killed him. investigators have not released the names of the victims or the shooter. some of the video you're about to see is disturbing. dash cam video captured the moment the gunman emerged from a gray car in the parking lot and opened fire on people shopping at the allen premium outlets. shoppers ran for cover as the gunfire continued until an allen police department officer in the area on an unrelated call sprang into action. >> he heard gunshots, went to the gunshots and engaged the suspect and neutralized the suspect. >> reporter: witnesses describe the panic and terror as the shooter fired dozens of rounds. >> it was nonstop and nothing we could do. >> oh, my gosh. >> it was terrible. >> we heard pop, pop, pop. i grabbed my kids and ran.

>> reporter: seven people were killed at the scene including the gunman. two later died from their injuries. three of the victims are in critical condition. four are stable. >> we know you are grieving, we are grieving. rest assured, the nation and the world are also grieving. >> reporter: texas has been here before. almost a year ago 19 children and two teachers were killed in an attack at robb elementary school in uvalde, texas. according to the gun violence archive this is the 199th mass shooting of 2023. today is only the 127th day of the year. >> omar, thank you. we turn to what's likely to be a difficult next few weeks at the border where several communities have declared states of emergency. our homeland security and justice reporter nicole scanga is there. >> reporter: the clock is ticking down on an end to title 42, another flashpoint in the

immigration debate, but here on the u.s.-mexico border it's not just a policy change, it's the front lines of a humanitarian crisis. in south texas, the department of homeland security says they've encountered an influx of migrants ahead of title 42's end, driven by an uptick in venezuelan nationals. still others wait in mexico, camped along the rio grande river. biden administration guidelines that kick in after may 11th promise more consequences like a one-way ticket on i.c.e. air. we watched as 133 migrants hands and feet shackled boarded a plane back to guatemala friday. in laredo, texas, this emergency shelter is a welcome reprieve for many like 29-year-old margarita who crossed the u.s.-mexico border pregnant with her 5 and 3-year-old daughters. back in venezuela she says there

is nothing. the mayor of laredo has declared a city wide emergency. >> the disaster is an imminent disaster. it may not be here right now, but it's like a hurricane. you board before the hurricane. >> reporter: with this week's policy change u.s. officials expect as many as 10,000 migrants a day to traverse the u.s.-mexico border at crossings like the one behind me. >> thank you. for more we're joined now by the homeland security secretary alejandro mayorkas. it's good to have you here in person, sir. >> good morning, margaret. >> before we get to migration, i want to ask, do you have any information about this latest mass shooting in texas, which may have been with an ar-15 style weapon? >> margaret, another horrific tragedy in our country. i spoke with the governor last night as well as the mayor. the matter is still under investigation. >> no information about the shooter? >> no, margaret. i think it's under

investigation. the state and local authorities are leading that investigation. >> let's get to the border. this is the greatest migration surge, you said, in the western hemisphere since world war ii. you've been preparing for more than a year and a half. how rough will the next few weeks be? >> margaret, we've been preparing for this for more than a year and a half, you are correct. it is, indeed, a regional challenge, and it requires a regional response, which is why we are working so closely with many countries to the south. it's going to take our plan a while to really take hold and people to understand that they can access lawful, safe, orderly pathways before they reach the border, and quite frankly, if they come to the border they will receive a consequence under our enforcement authorities. >> you are, as the administration is setting up prosing centers in colombia and

guatemala so migrants can start the asylum process before they make it to the border. those aren't set up yet. >> we are furthest along with colombia. it should be a matter of weeks. we have additional lawful pathways that already have existed for people to access. >> the phone apps you're talking about? >> the parole program for cubans, haitians, nicaraguans and venezuelans. we are expanding our family reunification programs. >> so you have announced 1500 troops that are going to el paso, texas. why not other parts of the border? is texas the most porous area? >> they will be dispersed as operational needs require. the deployment of active duty troops is not to do enforcement work or interact with the migrants, but provide other support so our border patrol agents can be out in the field. >> the governor of arizona and the senior senator told us that the federal government is

unprepared. senator sinema said homeland security is not sharing information with her or local law enforcement on numbers of migrants, processing time and available busses to transport them. the governor also said she needed more urgency and can't get specific information on dollars for emergency shelters. why isn't that kind of specific detail being shared? >> well, i respectfully disagree with the senator and governor. number one, we are prepared, as we noted at the very beginning of our conversation. we've been preparing for this for quite some time. we tried to end title 42 repeatedly and we're stopped from doing so by the courts. we are prepared number one. number two, we have a migration information center set up to communicate with state and local officials and we have been doing so. we are using our fema regional coordinators, as our key points of contact. i spoke with senator sinema i think within the last two weeks and our personnel are in touch

with other officials on a regular basis. >> she said she had been in also with the white house, but the information was not adequate. so do you think there is a communication problem here? >> i do not. if there is a question that has been unanswered, we will answer it. i will tell you, though, let's take a step back because there's a very important message, not to communicate only to senator sinema but all senators and all members of the house of representatives. we need immigration reform. everything that the department of homeland security is doing, everything that our partners across the federal government are doing, is within a broken immigration system. the president passed to congress a proposal to fix our broken immigration system on the first day in office. >> that's like a to-do list. that's difntyourhoulder bind pn

me, democrats control the immigration. >> margaret, we have been pushing for immigration legislation since day one, and by the way, it didn't start on day one. this is a decades long problem. the immigration system hasn't been fixed since the '90s. >> absolutely. and it has only seemingly gotten worse with the set of circumstances we're in now. to that point, this gets so politicized and you take a lot of the political heat yourself because you run the agency on the securit portion of this. if the politics are so bad and the security situation is so difficult and you need more resources, why isn't the president out there talking more about the need for a border bill? why isn't leader schumer doing this? it seems like the issue is being conceded to republicans? >> margaret, i respectfully disagree. i spoke with leader schumer also within the last two weeks. we are in constant communication --

>> is there a timeline for him? >> we are -- there is not a day that goes by that we are not urging congress to pass reform. >> so does the administration support the bipartisan bill from senator sinema and tillis that would allow for expelling of migrants for two years similar to title 42? >> title 42 and the expulsion authority is a public health authority. it is not an immigration authority. we will be using our immigration authorities which call for a consequence regime which is why we have to correct the lies that smugglers tell vulnerable migrants. they think they are coming and they will be able to stay and that is false. what i would say to the senator, senators tillis and sinema, what we need is our system fixed. >> right. >> not this band-aid solution. >> senator bob menendez, a democrat, said the administration has ignored his

proposals. he objected to the sending of troops, and he criticized lack of planning. if you have people who are border state senators who want to do something, and then you have the chairman of the senate foreign relations committee saying he wants to do something, why is the administration ignoring that or pushing it aside? >> the administration is not ignoring it. >> menendez said that. >> we are pressing forward. by the way, senator menendez, the chairman of the foreign relations committee, set forth a really thoughtful document with a number of pillars of action and we have, indeed, implemented a number of those. >> henry, a democrat, said he has confidence in you and homeland security but the white house is holding you back? >> untrue. one team, one mission, we are prepared to execute it. >> mr. secretary, we'll be watching. good luck to you. >> thank you so much, margaret. late last week we traveled to the border state of arizona for the mccain institute sedona

forum honoring the late senator known for his straight talk and ability to forge bipartisan compromise when the need arose. we spoke with the state's newly independent senator kyrsten sinema. she left the democratic party last fall and is very much aligned with that maverick mindset. >> we're in the midst of the hemisphere's worst refugee crisis. >> that's right. >> partisanship is at such a high level. is it simply a political reality that you can't get comprehensive reform done? you have to chip away at this piecemeal? what you introduced was a temporary two-year authority to expel migrants with an exemption for asylum claims because of the immediate title 42 expiration. >> that's a band-aid. the biden administration had two years to prepare for this, and did not do so. our state is going to bear the brunt. migrants will be in crisis as soon as next week. it will be a humanitarian crisis because we're not prepared. the legislation we introduced

yesterday is ability tiding this over, giving us time and space for the biden administration to do their job and us legislators to create a plan to get through the house and senate. >> but the votes aren't there for this replacement essentially of title 42. the two-year ability to expel migrants without guaranteed asylum. >> we don't know that yet. we introduced the bill yet. >> republican senator langford was out criticizing it saying it doesn't solve the problem. >> it does sn't solve the probl. he's right it doesn't solve a problem. >> you think you can get this passed before next week may 11th? >> oh, god no, margaret. this is the united states senate. i don't think you can get agreement on a date by next thursday. the united states is functioning at a dysfunctional level right now and that's due to the partisanship that is driving both parties. as you and i both know, both

parties have benefitted for decades by not solving this challenge. they use it to bash each other in elections and what bothers me about that they don't live in a border state and know the mayor has to put migrants in his car and drive them to phoenix because they're released in a town that has -- for migrants to sleep in you pla for them to go. this is the crisis for our border communities and migrants and so unfortunately, the parties are thinking about this from a political perspective. not a human perspective. >> you said the administration planned to create a workable plan for migrants after may 11th, title 42. they would say they got troop deployment, a phone app, expansion of legal migration, regulation to bar migrants from

asylum if they did not seek asylum in a third country. do you support any of he nistration hasne? >> these steps announcedit ha1500 troop along the border is helpful. it is a border of over 2,000 miles. 1500 troops isn't going to get the job done. that's just reality. >> yes. >> we also are very concerned that all this is happening in the week or so before the rollout. just today i was on the phone with a sheriff of cochise county who has got noninformation from the department of homeland security or the federal government about what the flow is going to look like, what they can expect from processing in terms of how long it takes to process migrants, no information, neither have i, about how many busses available to transport migrants. he's gotten the information he does have from me because i call him every few days. he's not gotten that information

from the department of homeland security. what's unfortunate is that i'm asking for that information, and i'm not getting it. so either the administration has that information and choosing not to share it, which is a problem since we're the ones that are going to deal with the crisis, or they don't have it and that's even more concerning because how do you prepare for an inflow of migrants when you don't know what you're going to expect? >> and that hasn't been shared with the governor? >> it has not been shared with the governor. i spoke with the governor yesterday. >> wow. >> it has not been shared. we do not have this information. there are three nonprofit organizations in arizona that provide incredible, incredible assistance to our border communities. one is in yuma, one tucson and phoenix and they don't have this information and they are responsible for accepting the migrants after they're released from custody. while it's wonderful that the administration is announcing like a 1500 troop deployment and processing centers which will not be operational by next

friday, those are good things, aspirational, that's not the same as operational. rent the busses, hire the drivers, build the softsided facilities to p that's frustrating, margaret. thatmeason i shur southern border are going to be bearing the brunt of it and our men and women, border patrol, will be working even longer shifts. >> have you talked to the white house directly about this? >> yes, i have. >> what's the response? >> it has not been adequate. >> do you care to elaborate? >> i do not. >> because what you're laying out is a level of crisis concern -- >> that's correct. >> they were -- >> that is what i have been doing. i've been raising the alarm -- >> they return your calls? >> oh, yes. >> and just not share information? >> just not -- right. that's right. this is a problem.

we've had two years to prepare for this. >> do you think that's personal? >> no. no, not at all. i don't think it's personal. i think that there's a system in washington, d.c., that is deeply disconnected from the real lives and experiences of border communities and the migrants who seek to come to this country. but what i would like, margaret, is for them to learn. >> president biden acknowledged you as the lead co-author of bipartisan infrastructure bill. he called you the most determined woman i know. leader mcconnell said you're the most effective first term senator i've seen in my time in the senate. what would you want to get done in a second term? >> immigration. you know, it's been part of my life's work. folks who know me for a long time in arizona know i started my career as social worker and when i started my career as a social worker i worked at an immigrant refugee community. that was many years ago. it has been really important to me my entire life. >> are we that far off from it

that we're looking past 2024? >> no. i would like to do it before then. our state has suffered the last 40 years because of the federal government's failure to do anything about it and we're facing the worst crisis of my life right now with immigration. i want to do it now. >> we'll have more of our conversation with the senator in our next half hour and we'll be back in one minute. i am here because they revolutionized immunotherapy. i am here because they saw how cancer adapts to different oxygen levels and starved it. i am here because they switched off egfr gene mutation and stopped owthof tumor c. there's a place that's making one advanced cancer discovery after another for 75 years. i am here... i am here.... because of dana-farber. what we do here changes lives everywhere. i am here.

hi, i'm jason and i've lost 202 pounds on golo. when you have to get wheeled through the airport because you're too heavy to make it and you have extreme pain, you have to make a change. golo enabled me to make that change. golo is real and it changes your life. in preparation for our trip here to sedona, arizona, and the conversation with senator sinema, we looked back through the "face the nation" archives to see what late senator john mccain had to say about immigration. here's what he said in 2007. >> whenever there's been a wave of immigration in this country, whether it's legal or illegal, there's been a certain backlash, all the way back to the irish need not apply, to the signs at stores in 19th century. and unfortunately, in some ways,

it's gotten, i think, too emotional and intense. americans want the border secured, so we have to secure the borders first. they didn't trust us or believe us when we said we would do it, so we have to do that first. let me add, as i pointed out, they are god's children. there are people who are being abused as we are speaking, who are human beings and people who are bad people, having them work and not paying them, people are being exploited, the coyotes are doing terrible things, shootouts on our freeways in arizona, emergency rooms overcrowded, safe houses, terrible things happen. there is a humanitarian side and maybe we ought to take that in consideration. >> and it's still an emotional issue and the challenges from 12 years ago still haven't found solutions. we'll be right back.

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>> announcer: this is the "cbs overnight news." it's been another violent weekend in america. the worst of it in two texas communities. we begin in the dallas suburb of allen, where a gunman killed at least eight people saturday, some of them children. cbs station ktvt identifies the gunman as 33-year-old mauricio garcia. he was staying at a nearby motel and later killed at the scene. today to honor the victims president biden ordered flags flown at half staff at federal buildings. he denounced the violence as senseless. cbs's omar villafranca is in allen tonight. and a war