captioning sponsored by cbs this is the "cbs evening news" with scott pelley. >> pelley: good evening. this is our western edition. a few hours ago, eric cantor was one of the most powerful men in washington, but late today he announced he is stepping down as house majority leader after a stunning defeat in a republican primary in virginia last night. he was up set by a candidate backed by the tea party, david brat, and it wasn't even close. cantor, elected to the house in 2000 and majority leader since 2011 appeared to be on track to become speaker of the house. his defeat was the first of a majority leader since that post was created more than a century ago. no one saw it coming and it sent shock waves across the country. our political team looks at why it happened and what happens next. first nancy cordes on capitol hill, nancy? >> reporter: scott, because this is washington, lawmakers began jockeying for cantor's leadership post within a few hours of his surprise defeat. all day long they have been holding secret meetings and texting each other asking for support in a house election to be held next week. >> in the end the voters chose a different candidate. >> reporter: cantor's defeat left lawmakers reeling. he was widely seen as the heir apparent to house speaker john boehner. >> eric cantor is a good friend of mine and has been a very good leader for our party. >> we came up short. >> reporter: cantor spent $5 million to his opponents $122,000, a 40 to 1 rich ratio. economics professor dave brat was considered such a long shot even tea party groups largely ignored him. >> this is a miracle from god. ( applause ) >> reporter: brat made immigration a marquee issue arguing cantor's support for granting citizenship to some undocumented children put him out of step with conservatives. >> cantor seems to sway either way. it's all what is in the best interest at the time. >> reporter: virginia voters like boyce best and joe deshazo said cantor's position and high rank worked against him. >> eric cantor spent so much time playing the national scene that he forgot about the people here in hanover. >> reporter: cantor's role as majority leader was to set the legislative agenda for house republicans and raise money for g.o.p. colleagues. democrats said you were too extreme. conservatives said you were too compromising. what advice do you have for your successor? >> i think that this town should be about trying to strike common ground. i've always said it's better if we can agree to disagree. but find in areas which we can produce results. >> reporter: cantor said he will be supporting house majority whip kevin mccarthy of california to replace him and scott, even though cantor will be relinquishing his leadership post at the end of next month, he does plan to serve out the remainder of his term. >> pelley: so what does this mean for the tea party, the republican party and for the country? for that we will go to the all- stars. joining nancy is bob schieffer, our chief washington correspondent, and john dickerson, our political director. bob, cantor had been trying to moderate the image of the republican party as a party that cared about people's needs. what does this defeat mean? >> reporter: well, i think what it does, scott, is just really underline how wide and how deep the divide is now in the republican party. this is like 1964 when you had eastern, more moderate republicans headed by nelson rockefeller and out west the very conservative republicans headed by barry goldwater. they never closed the divide in 1964 as a result barry goldwater got beat and beat badly in that presidential election. >> pelley: john dickerson, i wonder, how do you see this? did brat beat cantor or did cantor beat himself? >> reporter: well, one republican strategist said the cantor campaign was guilty of political malpractice. majority leader traveled a lot raising money for his party but but that meant he wasn't home defending his turf. that's perhaps because his pollster said he was well ahead in this race. cantor's numerous attack ads introduced voters to his relatively unknown opponent david brat without harming him. and then cantor took positions, particularly on immigrants, a hot-button issue that were at odds with his record. and brat seized on that and said cantor was soft on illegal immigrants. and said this proves republican leaders in washington had lost touch with their voters. >> pelley: nancy, here is one of the things strange about this, cantor was an early supporter of tea party candidates. he went around the country and raised money for them. what changed? >> reporter: well, he was a very vocal, very high profile advocate for the tea party agenda initially. but over the course of the past year he began to back away. particularly after the tea party lost some of its luster in the wake of the government shutdown last fall. that really angered some conservatives who came to see him as a fair weather friend. >> pelley: and finally, bob, the midterm election, of course, is in november. does this defeat of eric cantor change the national political landscape? >> reporter: well, i think it probably does. republicans are going to have to decide what they want to do here. people who look at this from a national perspective, the national candidates and consultants and so on. if the republican party is going to be successful in electing a presidential candidate in 2016, they're going to have to find a way to appeal to hispanic voters. yet the congressional candidates for republicans, they don't have many, most of them, many hispanics in their districts. so they're not as interested in that. between now and these coming elections, republicans are going to have to decide who and what they want their party to be and right now that's up in the air. no one can really answer that question. >> pelley: and not much hope for immigration reform any time soon. john dickerson, nancy cordes, and bob schieffer thanks very much. in another major story unfolding tonight, more than 4,000 americans died fighting in iraq and what they won is being lost now with remarkable speed. more towns fell today to islamic extremists who launched a massive surprise attack this week. this is, in large part, a battle between the two main branches of islam. an extremist group that wants to impose a strict islamic state has taken territory now, highlighted here in orange, spanning from syria all the way through iraq. iraq's second largest city, mosul, fell yesterday. and here's elizabeth palmer. ( gunshots ) >> reporter: this evening iraqi forces were digging in to battle islamic militants on the outskirts of the oil city of kirkuk. ( gunshots ) but just 90 miles away, mosul had already fallen into militant hands with barely a fight. youtube video shot yesterday shows one of their convoys rolling into the city past burning police and army vehicles. the only sign of the security forces-- the uniforms they abandoned before they deserted. one masked fighter gloated on camera about the route and then warned this is just the beginning. the group has big ambitions in an area they're fighting to control, to establish a vast fundamentalist islamic state. and in the last 24 hours they've attacked key towns where for the most part iraqi security forces simply melted away. iraq's prime minister nuri al- maliki has declared a state of emergency and blamed his army collapse on a conspiracy, but so far he hasn't explained how he will address this crisis. meanwhile desperate iraqis in their cars waited to cross the border into safer kurdish territory. the u.n. estimates as many as half a million people are now on the move. >> pelley: and we find liz palmer tonight in beirut, lebanon, and liz this has been a lightning assault. the iraqi government taken by surprise it would seem. is there any way to knows what's coming next? >> reporter: well now baghdad is under threat and the government has to do something. it seems likely it will be some sort of military counter offensive, maybe using the special forces better armed and better trained. a source near the kurdish regional government says they expect to see something like that in the next 72 hours. >> pelley: and the white house watching all of this with enormous concern. liz palmer, thanks very much. and tonight we are getting a and tonight we are getting a fuller picture of sergeant bowe bergdahl from what appear to be his own writings. today "the washington post" published quotes from journals it received from an oregon woman who says she is a close friend of bergdahl. bergdahl is still hospitalized after five years as a p.o.w. in the afghan war. he was captured after he walked off his post. margaret brennan joins us now with more on all of this, margaret? >> reporter: scott, we spoke to the woman who says she is a friend of bergdahl and received these messages just days after his disappearance. she's sharing them now, she says, in order to protect him. according to "the washington post," in a handwritten journal entry the same month he headed to army basic training, bergdahl wrote: once he arrived in afghanistan in 2009 bergdahl reportedly wrote: a year later, in an e-mail to a friend, bergdahl said: then just three days before unit members said bergdahl walked off post, he sent an e-mail to friend saying: the army has declined comment, but we did learn today that bergdahl enlisted just two years after the coast guard discharged him just 26 days after boot camp. the army was aware but they issued him a waiver. this was during the same time as the surge in afghanistan and they were trying to get more soldiers to serve. >> pelley: margaret brennan at the pentagon for us tonight, margaret, thanks very much. margaret, thanks very much. today police identified the teenager who shot and killed a fellow student yesterday at their high school in troutdale, oregon. they say that jared padgett, a 15-year-old freshman hid an assault rifle, a handgun and ammunition in a guitar case and a duffel bag when he rode the bus to school. the police say he killed 14- year-old emilio hoffman and slightly wounded a teacher before he took his own life. the motive for the attack is not known. police in las vegas released surveillance video today showing the final moments of a couple's shoot-out with police. on sunday, jared and amanda miller killed two police officers and a civilian and were surrounded in a wal-mart. amanda miller is seen raising her gun toward her husband but the police say she did not shoot him as was previously thought. she took her own life, turns out jared miller was killed by an officer's bullet. we have something remarkable tonight. this is going to be your first look at a television interview with pope francis. popes don't do interviews, but the unpredictable francis sat down with israeli journalist enrique zimmerman who helped arrange sunday's prayer meeting between the israeli and palestinian presidents. francis is the most accessible pope in modern times, shunning the closed popemobile which was rolled out after the attempted assassination of john paul ii. francis speaking in his native spanish said, i am not going to greet the people and tell them that i love them from inside a sardine can even if it's made of glass. it's a wall, he said, and i can't live that way. besides that, the pope said, at my age, he's 77, i don't have much to lose. francis said he has no personal agenda as pope. he said he never expected to be elected. i came to the conclave, he said, with a very small suitcase to return to argentina as soon as possible. francis is a huge fan of world cup soccer and his home team from argentina which is a fierce rival of brazil, the host of the matches. the pope said, "the brazilians asked me to be neutral. and i'm keeping my word." we'll have more of enrique zimmerman's rare interview with pope francis on friday. teacher tenure was struck down in california. will other states follow the lead? 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>> it leaves brazilians holding that bag and that bag is empty at the bottom and a lot of money is flowing out of it. >> reporter: uncertainty still hangs over the opening of these games. transit workers are threatening to strike. protestors are expected to march here to the stadium. and scott, in rio, at least six activists were taken into custody by police. >> pelley: elaine quijano covering the world cup for us. thanks. and we'll be right back. thanks. and we'll be right bac r. try phillips fiberies. they're delicious, and an excellent source of fiber to help support regularity. wife: mmmm husband: these are good! marge: the tasty side of fiber. from phillips. you wouldn't have it she any other way.our toes. but your erectile dysfunction - it could be a question of blood flow. cialis tadalafil for daily use helps you be ready anytime the moment's right. you can be more confident in your ability to be ready. and the same cialis is the only daily ed tablet approved to treat ed and symptoms of bph, like needing to go frequently or urgently. tell your doctor about all your medical conditions and medicines, and ask if your heart is healthy enough for sex. do not take cialis if you take nitrates for chest pain, as it may cause an unsafe drop in blood pressure. do not drink alcohol in excess. side effects may include headache, upset stomach, delayed backache or muscle ache. to avoid long-term injury, get medical help right away for an erection lasting more than four hours. if you have any sudden decrease or loss in hearing or vision, or any allergic reactions like rash, hives, swelling of the lips, tongue or throat, or difficulty breathing or swallowing, stop taking cialis and get medical help right away. ask your doctor about experiencing cialis for daily use and a free 30-tablet trial. when we're having this [ bubbmuch fun, why quit?] and new bounty has no quit in it either. watch how one sheet of new bounty keeps working, while their two sheets just quit. new bounty. the no-quit picker-upper. ♪ from the bounty factory in northern utah... to a walmart near you. join walmart and bounty in supporting american jobs. so i tried depend and it made the difference between hearing about my daughter's gym meet, and being there. yeah! nailed it! unlike the bargain brand, depend gives you new fit-flex®, our best protection. it's a smooth and comfortable fit with more lycra strands. hi sweetie! get your free sample at depend.com. officers for every citizen?t we uncovered. next weather talent appears at wx center with generic pinpoint filling monitor the take special >> pelley: finally tonight, seeing isn't always believing. anna werner found that that oil truck or school bus she passed on the highway might actually be a front for drug runners. >> reporter: drug traffickers showed they could mimic the postal service or fake overnight delivery with a fedex truck to carry their product through south texas. >> you can see the hydraulics device. >> reporter: sheriff t michael o'connor has even seen a halliburton oil tanker used. he says if you can think of it, they can clone it. >> i think they probably spent a lot of time seeing what type of clone they can make. >> reporter: how good are these fakes? >> some of them are excellent. >> reporter: this ambulance carried e.m.t.s and a fake patient. the marijuana was stuffed into the ceiling. >> they'll bail out and take off. >> reporter: sergeant jorge medina first stumbled upon the problem in 2007. he got into a car chase with what looked like a texas department of transportation truck. it finally spun-out. >> it had flipped over and there was black bundles scattered all over. >> reporter: it held nearly a ton of marijuana. police don't know how many cloned vehicles are on the road. but sheriff o'connor counts at least 15 seized in the region carrying tendons of marijuana since 2007. they also confiscated this u.p.s. 18 wheeler. so how much does a truck like that hold in terms of drugs? >> tons. let's just leave it at that. >> reporter: there was nearly 1.4 tons stashed under the seats in this cloned school bus and the drug runners knew there was only one way to keep the kids on the bus quiet. they used mannequins, anna werner, cbs news, dallas. >> pelley: that's the real "cbs evening news" for tonight. for all of us at cbs news all around the world, good night. your realtime captioner is linda macdonald. attracts teenagers into danr tonight, controversy over a plan to bring junior rotc to an east bay school. some say it attracts teenagers into dangers they don't fully understand. others say programs like it are needed. good evening, i'm allen martin. >> i'm veronica de la cruz. kpix 5's ryan takeo is in richmond where the fierce debate is just getting started. ryan. >> reporter: that meeting just started and before the school board votes, they are going to hear an earful from antiwar activists. >> tenth grade, i'm going into tenth grade. >> reporter: and joseph wants to be one of 60 students in de anza high school's first junior rotc program. a u.s. air force instructor would use this classroom. joseph and his mom think he will learn a lot. >> i'm learning how to be disciplined and respectful like integrity and stuff. >> but to be a leader you have to be a follower. and that's humbling. >> reporter: first, west contra costa unified has to approve the program and some are questioning its value. >> it's the recruitment for foot soldiers or soldiers in general to fight. >> reporter: margaret brown says enemy north and low income students -- says especially minority and low income students might find it tempting. >> they may not their options or may not indeed because of the economic circumstances have options. >> reporter: she wants this way out of neighborhood -- she warns this way out of the neighborhood could lead them into war. margaret used to teach in the district. now she is trying to stop her former employer from adopting junior rotc. >> there are a lot more people than i thought, it wasn't even on the agenda. >> reporter: the district board president says more than a dozen voiced concern at the last board meeting but he argued the program is worth the