a fair measure of dread looking at the house races. >> who is going to vote on tuesday? (cheering and applause). don't forget. >> police in wisconsin say a driver accused of hitting and killing three girl scouts and their troop leader had been inhaling chemical vapors right before the crash. >> a community in utah is mourning after its mayor was killed in afghanistan while he was deployed with the national guard. >> there's just really no words to express the loss we feel. >> the "wall street journal" reported that amazon is going to split its second headquarters between two cities. >> there are three contenders, crystal city, dallas, and new york city. >> the winner of the largest powerball jackpot in iowa history just came forward. >> single mom lerwynn west opted for the lump sum. >> first thing i'm going to buy, i'm going to buy a car. >> glor: good evening. i'm jeff glor at cbs news election headquarters here in new york. this is our western edition. in less than 12 hours now, polling locations will begin opening in parts of the country. control of the congress is at stake as voters make a critical decision on what sort of senate and house the president will deal with for the second half of his first term. the president is going all out to keep both chambers in republican hands in what he acknowledges is in large measure a referendum on him. we have a team of campaign 2018 correspondents covering the key races tonight. we begin with weijia jiang traveling with the president. >> the energy that this whole party has now, it's really incredible. >> reporter: a confident president trump left washington for a three-rally sprint to close his campaign blitz. first stop, cleveland, ohio. >> everything we have created and achieved is at stake on election day. >> reporter: the president's surrogates are part of the full- court press. >> that blue wave is going to hit a red wall. >> reporter: the final push follows an intense weekend of stumping in four states. >> hello, montana. thank you very much, georgia. pensacola, florida, we love it. >> reporter: and intensifying the rhetoric on immigration, which tops his list of key issues. >> democrats are inviting caravan after caravan, isn't that nice, of illegal aliens to flood into our country. >> reporter: the trump campaign issued similar warnings in this controversial tv ad, which linked immigrants seeking asylum to an illegal immigrant and convicted murderer. >> the migrant caravan must be stopped. >> reporter: nbc aired it during "sunday night football," but pulled the ad today, citing the insensitive nature. fox news and facebook stopped running it, too, but president trump stood by it. >> well, a lot of things are offensive. your questions are offensive a lot of times. >> reporter: in the past 16 years, the only president with worse approval ratings heading into a mid-term election than mr. trump was george w. bush in 2006 when republicans lost 30 seats in the house. democrats hope to see a repeat but know it's not a done deal. "saturday night live" took advantage of their insecurity. >> democrats are taking back the akuse. it's a win we need and a win we're going to get. i'm sure of it. >> reporter: former president barack obama, who has campaigned extensively during this mid-term election, was out working to turn up the turnout. >> the character of this country is on the ballot. who we are is on the ballot. >> reporter: voters seemed to know it. a cbs news battleground tracker poll finds 93% of them in both parties say their vote tomorrow matters just as much or more as in a presidential election. more than 36 million people have already voted, shattering the mid-term record set in 2014 when about 27 million cast a ballot early. after president trump wraps up here in fort wayne, indiana, he is heading to missouri for one final rally before election day tomorrow where he'll watch all the returns from the white house. jeff? >> glor: weijia, thanks very much, with the president speaking directly behind you. thank you. one of the most closely watched and hotly contested races is in georgia. the state could elect the nation's first african american female governor. eavoting thereas ady set a record with more than two million georgians casting ballots. the race has been marred now by new hacking allegations the republican candidate is making against the democrats. here's mark strassmann. >> good to see you. >> reporter: republican brian kemp roiled this tightly contested race with his call to the f.b.i. to investigate a hacking charge against the state's democratic party. kemp, currently georgia's secretary of state, who oversees elections, offered no supporting evidence and denied the charge was a last-minute campaign ploy. >> we're handling this like any other incident we would get dealing with potential cyber crimes. i'm not worried about how it looks. i'm doing my job. >> reporter: kemp based his charge on an e-mail sent by a private citizen to a georgia democratic party official, which flagged a vulnerability in the state's election database. georgia's cr they were merely trying to bring attention to possible security flaws. kemp's opponent, democrat stacey abrams, says the hacking allegation is proof kemp can't do his job. calling the allegations a witch hunt. >> instead of addressing the flaw and taking responsibility, he decided to go to a desperate place and blame democrats for simply alerting cyber security experts to his failure. >> reporter: the hacking charge is the latest twist in a bitter campaign as abrams looks to become america's first black female governor. she has suppressing georgians' vote, especially in minority communities. >> trying to shut down our right to vote. how can anyone trust someone like brian kemp? >> reporter: kemp has called those allegations a farce. a trump loyalist, he has consistently painted abrams as an extreme liberal. over the weekend, he tweeted this photo of armed black panthers supporting her. this is a get out the vote rally in atlanta's ebenezer baptist church, officially non-partisan, practically, this crowd is all abrams. turnout is key for both sides tomorrow, jeff. polls show this race is dead even. >> glor: mark strassmann, thank you very much. the president's final campaign stop is missouri tonight, one of the battleground states that could decide control of the senate. democratic incumbent claire mccaskill is trying to perform a tricky balancing act on key issues as the president goes all out for her republican opponent. dean reynolds is in missouri. >> reporter: in the last days of this tight campaign, claire mccaskill's political compass at times veers rightward. >> we need to stand strong for things like balance. >> reporter: she's not one of those crazy democrats, she insists. nor is she a softy on that caravan of migrants the president calls a threat. what is your position on that caravan? >> i think that we have to make sure that we secure the border and that there is an orderly process under the law that allows people who come to our borders to turn themselves in for asylum. um reporter: last week, mccaskill even said the president should use every tool at his disposal against the migrants, but today she clarified. i'm wondering if your support for him includes shooting at them. >> no. don't forget to vote on tuesday. >> reporter: a bit of positioning can be prudent politics, but critics say backing and then opposing the president is a bid to have it both ways in a state mr. trump won by almost 19 points. >> president donald trump in missouri. >> reporter: missouri attorney general josh hawley, a lock-step supporter of the president, is challenging mccaskill and says she's a liberal, plain and simple. >> she votes with chuck schumer 90% of the time. is that what we want in missouri? >> no. >> she voted to raise your taxes. is that what we want in missouri? >> no. >> reporter: the latest surveys show this race to be a toss-up, but because there is no early voting in missouri, it's difficult to gauge enthusiasm, so both campaigns are doing what you see behind me now, jeff, contacting voters and making sure they get to the polls. >> glor: fascinating race to watch there in missouri, as is the one in nevada. we have more on that race now. it is a key factor there is the youth vote. here's jamie yuccas. >> we vote, we win! we vote, we win! >> are you voting tomorrow or are you already voted? >> i've already voted. >> reporter: millennials now outnumber boomers in america with the potential to be the biggest voting bloc. the question is: will they go to the polls? have you voted yet? >> yeah, i have. >> reporter: the group next gen started get out the vote events at the university of las vegas a year ago. the effort seems to be working. compared with the 2014 mid- terms, 18 to 29 year olds are really showing up for early voting in several hotly contested races, including arizona, florida, georgia, and nevada. have you been surprised by kind of how many people, how many young people have come out to vote? >> yeah, i honestly waited in line for 45 minutes and it was early voting. >> reporter: the senate race is tight with obama campaigning for democrat jacky rosen and the trump family shoring up the base for dean heller. >> are you guys sick of winning yet? >> no! >> reporter: young voters have been considered unreliable in the past, but in states here like nevada that have that early voting, they are showing up. jeff, the top issues for young people on both sides are college costs, immigration, equality, healthcare, and gun laws. >> glor: all right, jamie yuccas in las vegas tonight. thank you very much. joining us now are cbs news chief congressional correspondent nancy cordes and also anthony salvanto, our director of elections and surveys. good to see both of you. big night tomorrow. it could be a long night tomorrow. anthony, more than 35 million people have voted already. what does that tell you? >> it tells you that turnout will be up if that trend continues. it tells you that new voters are coming into the process. we want the look at those voter process. and big states like texas and florida, four in ten of those folks didn't vote in the last mid-term. early voting has soared past the last mid-term overall in many states. if that trend continues, that's a key thing to watch. >> glor: nancy, let's break down some of the numbers. what does it take for control of congress to slip on either side potentially? >> well, in the senate there are 35 seats up for grabs. democrats need a net gain of two to take control, which is not as easy as it sounds. that's because 26 of those seats are already controlled by democrats. so they have to protect all of those seats and then pick up two of the only nine seats that are currently controlled by republicans. that's just how the map shapes out this year. now, in the house where everyone is up for reelection, democrats have a lot of avenues they believe to pick up the 23 seats that they need. that's because there are about 66 seats that we believe are in play tomorrow, and all but six of them are controlled by republicans right now. >> glor: we need 218 for that majority in the house. anthony, early signs, what are the early signs you're looking for tomorrow? >> all the action is in the suburbs. so we'll start with early states on the east coast, new jersey, virginia, florida, districts that usually vote republican that democrats are trying to pick up, if those suburban districts start going toward the democrats, that's a good sign for them. if republicans hold those, it could be a better night for them. >> glor: can't wait to chat more with both of you tomorrow night. we'll see you then for our special cbs news election night coverage beginning at 5:00 p.m. on our streaming news service cbsn and then continues on television with a prime time special at 8:00 p.m. eastern and pacific, 7:00 central. the weather could play a big role in the midterm elections, especially on the east coast. a system that brought at least one tornado to louisiana today will bring storms up the i-95 corridor tomorrow from south carolina to new jersey. as promised, the trump administration today reimposed all economic sanctions on iran that had been lifted under the 2015 nuclear deal. the iranians protested the move, which is meant to punish the regime for supporting terrorist groups in the middle east. elizabeth palmer tonight is in tehran. >> reporter: day one of the new sanctions saw iranians resigned to the fact that a hard life is about to get even harder. the official reaction was belligerence. state television broadcast pictures of military air defense exercises. and an anti-american rally on sunday was a sea of hostile signs and banners. >> your president is a megalomaniac. >> reporter: this demonstration is meant as a show of force, and the message is clear: iranians are not afraid, and iran is going to shrug off these sanctions. that may be the party line, but even at this conservative rally, not everyone looks convinced. iran's leaders, along with the hardline revolutionary guard are under pressure. in spite of the sanctions, they have got to earn enough money from oil sales to keep the economy ticking over or face their worst nightmare, a popular uprising. elizabeth palmer, cbs news, tehran. >> glor: police in wisconsin today said the driver of a pickup truck that struck and killed three girl scouts and one of their mothers had been sniffing chemicals before the accident. 21-year-old colten treu sped off but later turned himself in. he faces multiple charges. the scouts had been picking up trash on a highway, part of a service project, when they were hit. coming up next ening news," cbs cameras captured u.s. troops massing on the border as the migrant caravans continue moving north. caravans continue moving north. the only one to combine a safe sleep aid, plus the 12 hour pain relieving strength of aleve. i'm back. aleve pm for a better am. is important to me so father being diagnosed with advanced non-small cell lung cancer made me think of all the things that i wanted to teach my kids. (avo) another tru story with keytruda. (roger) my doctor said i could start on keytruda so i did. with each scan things just got better. (avo) in a clinical study, keytruda offered patients a longer life than chemotherapy. and it could be your first treatment. keytruda is for adults with non-small cell lung cancer that has spread... ...who test positive for pd-l1 and whose tumors do not have an abnormal "egfr" or "alk" gene. it's the immunotherapy with the most fda-approved uses for advanced lung cancer. keytruda can cause your immune system to attack normal organs and tissues in your body and affect how they work. this can happen anytime during or after treatment and may be severe and lead to death. you experience new or ay if worsening cough, chest pain, shortness of breath, diarrhea, severe stomach pain or tenderness, nausea or vomiting, rapid heartbeat, constipation, changes in urine, changes in eyesight, muscle pain or weakness, joint pain, confusion or memory problems, fever, rash, itching or flushing, as this may keep these problems from becoming more serious. these are not all the possible side effects of keytruda. tell your doctor about all your medical conditions including immune system problems, or if you've had an organ transplant or lung, breathing, or liver problems. (roger ) before i'd think of the stuff i might miss. but now with keytruda, we have hope. (avo) living longer is possible. it's tru. keytruda, from merck. ask your doctor about keytruda. introducing the new capital one savor card. earn 4% cash back on and 4% on entertainment. now when you go out, you cash in. what's in your wallet? >> glor: the pentagon said today more than 5,100 u.s. troops are now stationed at the border with mexico as caravans of central americans draw closer. mireya villarreal had a first look at soldiers arriving in one border town. >> reporter: all afternoon there's been a steady stream of military vehicles, heavy construction equipment and rolls of barbed wire fence. a week ago this was an empty field outside the small town of donna, texas, and now it's home to at least 300 troops. the soldiers are here as back-up for customs and border patrol agents. army specialists say their first big task is to help reinforce the ports of entry with new barbed wire fencing, but they say they won't be going on patrols. there are reports this deployment could cost upward of $200 million. president trump sent the troops to the border as part ofion ith. he says to combat a caravan of central american migrants. >> you look at what's marching up, that's an invasion. that's an invasion. >> reporter: the bulk of that caravan is at a stadium near mexico city more than 650 miles away. we've gotten a lot of mixed reactions from the people that live in the rio grande valley, some even calling this a mid- term election stunt, but this is a dangerous area often exploited by human and drug smugglers. and border patrol agents, local law enforcement, they tell me they welcome this help, jeff. >> glor: mireya, giving us that look tonight in donna, texas. mireya, thank you very much. still ahead, amazon delivers a surprise in its quest for a second headquarters. >> when you can't watch the evening news on tv, don't worry. we've got you covered. subscribe to our podcast sponsored by liberty mutual. i'm missing out on our family outings because i can't find a bladder leakage product that fits. everything was too loose. but depend® fit-flex feels tailored to me. with a range of sizes for all body types. depend® fit-flex underwear is guaranteed to be your best fit. but prevagen helps your brain with an ingredient originally discovered... in jellyfish. in clinical trials, prevagen has been shown to improve short-term memory. prevagen. healthier brain. better life. coaching means making tough choices. jim! you're in! but when you have high blood pressure and need cold medicine that works fast, the choice is simple. coricidin hbp is the #1 brand that gives powerful cold symptom relief without raising your blood pressure. coricidin hbp. say it is too soon to tell what caused a helicopter crash west of san antonio, texas, on saturday. killed in the crash were a couple who had just married and the pilot. will byler and bailee ackerman had just departed the reception on their way to their honeymoon. they were both 24 years old. a split decision for amazon. the "wall street journal" reported today the company will divide its second headquarters between two locations to ease potential issues with housing and transit. each will employ 25,000 workers. amazon is said to be negotiating with crystal city in northern virginia, new york city, and possible sites. now a lesson-- lesson in persevere ans from a baby bear. this video was just released over the and now a lesson in perseverance from a baby bear. this video was just released over the weekend. it is amazing. the video shot in russia shows the cub struggling to climb a mountain. it falls down a number of times. it's tough to watch. over and over. but it did not give up. it eventually got back up there with mom. what did the cub see? the other side of the mountain. we'll put that full video up on facebook and twitter. it's really good. up next here tonight, a fallen hero's final message to a divided country. >> this portion of the "cbs evening news" is sponsored by: >> this portion of the "cbs evening news" is sponsored by: like you do sometimes, grandpa? well, when you have copd, it can be hard to breathe. so my doctor said... symbicort can help you breathe better. starting within 5 minutes. it doesn't replace a rescue inhaler for sudden symptoms. doctor: symbicort helps provide significant improvement of your lung function. symbicort is for copd, including chronic bronchitis and emphysema. it should not be taken more than twice a day. it may increase your risk of lung infections, osteoporosis, and some eye problems. tell your doctor if you have a heart condition or high blood pressure before taking it. grandpa: symbicort could mean a day with better breathing. watch out, piggy! (giggles) get symbicort free at saveonsymbicort.com. if you can't afford your medication, astrazeneca may be able to help. introducing the new capital one savor card. if you can't afford your medication, earn 4% cash back on dining and 4% on entertainment. now when you go out, you cash in. what's in your wallet? smile dad. i take medication for high blood pressure and cholesterol. but they might not be enough to protect my heart. adding bayer aspirin can further reduce the risk of another heart attack. because my second chance matters. be sure to talk to your doctor before you begin an aspirin regimen. that cough doesn't sound so good. take mucinex dm. i'll text you in 4 hours when your cough returns. one pill lasts 12 hours, so... looks like i'm good all night! mucinex dm releases fast and lasts 12 hours, not 4. let's end this. to take care of yourself. but nature's bounty has innovative ways to help you maintain balance and help keep you active and well-rested. because hey, tomorrow's coming up fast. nature's bounty. because you're better off healthy. nature's bounty. ♪ ♪ if it feels like you live in the bathroom wi recur cstation d belly pain, talk to your doctor and say yesss! to linzess. yesss! linzess treats adults with ibs with constipation or chronic constipation. linzess can help relieve your belly pain, and lets you have more frequent and complete bowel movements. linzess is not a laxative. it helps you get ahead of your recurring constipation. do not give linzess to children less than 6 and it should not be given to children 6 to less than 18, it may harm them. do not take linzess if you have a bowel blockage. get immediate help if you develop unusual or severe stomach pain, especially with bloody or black stools. the most common side effect is diarrhea, sometimes severe. if it's severe, stop taking linzess and call your doctor right away. other side effects include gas, stomach-area pain, and swelling. so say yesss! to help for recurring constipation. yesss! to help for belly pain. talk to your doctor and say yesss! linzess. >> glor: at the end of a bitter election campaign, americans would do well to consider a fallen hero's final message. here's john blackstone. >> reporter: in north ogden, utah, the flags at city hall are a tribute to the town's fallen mayor. >> there's just really no words to express the loss we feel. >> reporter: major brent taylor was a public servant committed to military service. four times he deployed to iraq and afghanistan, awarded a bronze star and a purple heart. he was one of 15,000 u.s. troops still serving in afghanistan, a war that has raged for 17 years. he posted this on facebook before his latest deployment. >> ours is a small sacrifice compared to what so many throughout our nation's history have done and given. >> reporter: but last week major taylor made the ultimate sacrifice, shot by an afghan soldier, a member of the litary he was helping to train. an act of betrayal that brought the loss of a husband, the loss of a father to seven children. >> he was an awesome role model. he was active in the guard, active in politics, his family, church, his city. we have lost a hero. >> reporter: just one week before his death, major taylor made what would be his last post. "we have far more as americans that unites us than divides us," he wrote, adding, "i hope everyone back home exercises their precious right to vote." >> he loved america and serving. that h his last words were "god bless america." >> reporter: brent taylor was a major and a mayor, a politician and a patriot, and above all, a husband and a father. john blackstone, cbs news, north ogden, utah. >> glor: that is the "cbs evening news" for tonight. i'm jeff glor at cbs news election headquarters in new york. we leave you now with the tower of london lit up to commemorate the centennial of the end of world war i. good night. it's a 24 hour campaign blitz and we're right in the middle of it. >> it's been a mad rush with candidates in the bay area pushing people to the polls. >> plus the gas tax, dialysis and rent control, we break down three of the most hotly contested and expensive ballot measures. >> also a bay area family devastated and confused tonight over how and when they learned their relative was