And now a new projection that we could lose another 30,000 americans to the virus by labor day. One officers view. For the first time were hearing from one of the men charged in the death of george floyd. Hear what he remembers about that day, plus see his body camera footage in the moments leading up to the deadly encounter. And wild attack. A biker gets too close to a bison and her calf while riding through a state park. Details on her injuries and why park officials had to track down the animal after the incident. First, we begin this morning with a look at todays eye opener, your world in 90 secon secon seconds. I guess harris could be bigger than you think. But in the end its not going to matters because were going to win. Reporter the democrats hit a milestone in the race for the white house. Just 80 days to go, and the Democratic NationalConvention Starts next week. Joe biden had the audacity to choose a black woman to be his running mate. How incredible is that . Reporter the pandemic has millions getting ready to cast their vote at the mailbox instead of the ballot box. I think the president is clear is intentionally trying to defund the Postal Service and block us from voting. Absolutely we should be universal wearing of masks. 5. 3 million cases of coronavirus in the u. S. As the death toll climbs toward 170,000. Reporter a public viewing and Memorial Service was held in houston for Army Specialist vanessa guillen. Even though shes not here physically, shes here spiritually. I feel her. Reporter a Massive Wildfire continues to burn out of control in southern california. It ticked up and just ran through fast. All that and a line drive to right field. Roman quinns being waved home. Hes safe he got his hand in and all that matters the election is heating up. Even the sim sons are involved. The Senior Adviser said Kamala Harris sounds like me. Lisa says she doesnt mean it as a compliment. If thats so, as an ordinary suburban housewife, im starting to feel a little disrespected. On cbs this Morning Saturday. Punting more birdie on seven, and it looks like its just going to hang on the edge. But hold on its moving a little bit. Got to wait for it. You know, tom petty said waiting is the hardest part. I could have sworn i saw a dimple move. Go on. Get there patience is a virtue in life and in golf when youre putting. Which ways the earth spinning . Its moving yes, oh how about that . Wow. This mornings eye opener is presented by toyota. Youre like go, go. Yeah, that was very impressive. Welcome to the weekend, everyone. Im Dana Jacobson along with jeff glor and michelle miller. Good to have the whole gang back this morning. Were going to get away from it all with a series of stories that may actually put some ideas in your head. I think with a kiss right back at you. Sorry. For our first escape here, were going to go back to nature with one of the most enchanting pursuits in the world fly fishing. Well go out on the water to explore why in pastime has endured especially during the pandemic, and well meet the queen of fly fishing whos been casting a line for over 90 years. Aboutgo with your bad self. Well visit with actress one. A few years ago she with Hilarie Burton morgan. A few years ago she left hollywood to buy a working farm. What happened didnt just change their lives but the lives of others in the town. Well show what theyve done to give back to the community that embraced them. Now that is a power couple. And musician Kathleen Edwards had a successful recording career and critical acclaim until she decided to walk away from it all and open a coffee shop. Yep, thats right, in canada. Shes now back with a new album and a new outlook on life. Anthony mason will catch up with her, and shell perform in a fantastic saturday session. Thats all ahead. We begin this morning with a dire warning from the u. S. Postal service that could affect tens of millions of voters. The post office telling most of the states that it cannot guarantee delivery of the expected crush of mailin ballots in time for election day counting. It comes as congress and the white house were at a stalemate over a Coronavirus Relief bill which would include billions in funding for the post office. As the president is seeking to cast doubt on mailin ballots cast in the upcoming election. Weijia jiang is traveling with the president who is spending the weekend at his new jersey golf club. Good morning. Reporter good morning, everybody. Cbs news has learned that the Postal Services Inspector General has launched an investigation into recent changes at post offices across the country made by the new postmaster general who is a trump appointee. Democrats say the changes are part of a concerted effort to sabotage the election. Talk Business Reporter during a friday night event at his bedminster golf resort, President Trump asked a group of new York Police Officers for help insulting democratic president ial candidate joe biden. Who likes slow joe . [ cheers ] who likes sleepy joe . [ cheers ] reporter the citys Police Benevolent association, the Largest Union representing nypd officers, endorsed the president s reelection campaign. Back in washington, democratic lawmakers are accusing mr. Trump of trying to undermine the election by withholding emergency funding for the u. S. Postal service in a Coronavirus Relief deal at a time when mailin ballots are expected to increase tenfold in november due to the pandemic. President trump insists without providing evidence that mailin voting will lead to election fraud. They can be forged. They can be captured. They can be taken. Reporter on friday, President Trump said he would sign an agreement with mailin voting money in exchange for republican priorities. Yeah. I would certainly do that, sure. I would do that. Reporter in a rare interview, former president barack obama weighed in on the controversy. What weve never seen before is a president say im going to try to actively kneecap the Postal Service to encourage voting. When i see problems i work to solve them. Reporter the Postal Service has sent letters to all 50 constituents and washington, d. C. , urging them to change their mailin voting timelines and warning several of them that theres a significant risk that some ballots will not be returned by mail in time to be counted. House Speaker Nancy Pelosi continued pressing for more resources. The removal of equipment within the postal offices and the rest is to undermine the Postal Service at a time when the Postal Service is needed now more than ever. Reporter the National Association of letter carriers, which represents 300,000 retired and active Postal Service workers, has endorsed the biden harris ticket. Joe biden tweeted that vote by mail is safe and secure, pointing out that just this week the president himself requested his mailin ballot. Michelle . Whats good for the goose, a lot of people saying that. Weija, thank you so much. Presumptive democratic Vice President ial nominee Kamala Harris is taking aim at President Trumps questioning of mailin balloting. In a tweet, the california senator takes note of the president s requested ballot for next weeks florida primary. She writes, quote, donald trump votes by mail but doesnt want you to. If its good enough for him, its good enough for us. Her remark comes as the president appears dead set on using a false and racist theory to go after harris. Ed okeefe reports. Ready, set, go reporter at an event alongside joe biden officially putting their names on the democratic ticket, Kamala Harris brushed off questions about the trump campaigns new constitutional conspiracy. What do you make of President Trump and republicans attacks on you . Im signing this because i am in this race to win. And with that guy right there. Reporter the president and his campaign are now publicly eory circulating among his supporters that harris is ineligible to run for Vice President. I heard it today, that she doesnt meet the requirements. Reporter years of settled law say otherwise. Harr harris parents emigrated from jamaica and india, and she was born in the United States. Experts say her birth in oakland, california, makes her a naturalborn citizen, which the constitution requires for the president. Mr. Trump who says he oppose says the idea of birth right citizenship, has done there before to barack obama. On cbs this morning, his soninlaw did little to clarify the president s position. He just said that he had no idea whether thats right or wrong. I dont see that as promoting it. It at the end of the day, its something thats out there do you accept that shes a qualified candidate . I personally have no reason to believe shes not. Reporter when asked, the president said he had no issue with a woman of color running. None whatsoever. You dont see her as a threat . None whatsoever. Reporter appearing at a womens conference, harris acknowledged her historymaking week. Joe biden had the audacity to choose a black woman to be his running mate. How incredible is that . Reporter biden and harris arent expected to be seen again until next week when they address the Democratic National convention virtually from an event center in bidens hometown of wilmington, delaware. Other highprofile speakers include the clintons, the obamas, and musical performances from john legend and billie eilish. For cbs this Morning Saturday, ed okeefe, washington. Here to break down the politics of the week is Gabe Debenedetti, National Correspondent for new york magazine. He is in charlottesville, virginia. Well get to that Virtual Convention in a minute. Lets start with the pick of Kamala Harris as the Vice President ial candidate along with joe biden. How is this being viewed right now by the party . Well, most people in the party are pretty excited about this. There was a lot of apprehension because, of course, joe biden did take quite a long time to make his choice. In the end it was in line with traditional timing before the convention. Harris, of course, is a historic pick as the first black and first Asian American person on a ticket. The first black woman i should say on a president ial ticket. While shes a fairly liberal senator, shes in the center of the party in many ways. I think people were excited to see her added. One of the things the campaign has started focusing on is the handling of the Coronavirus Response from the Trump Administration. How effective has that been so far . Well, if you look at the polling numbers, the biden team and a lot of democrats would say very effective in the sense that joe biden does intend to have a fairly large lead here. It isnt because hes been doing that much work really on that messaging, its really because of the president s handling itself. This is the overwhelming crisis thats everyone is dealing with right now, whether you look at it as a Health Care Issue or as an economic issue. These are all wrapped together. Of course, when we have tens of millions out of work, hundreds of thousands dying and many more sick, its an inescapable thing. Naturally the election is going to be then viewed as a referendum on the president. Michelle miller here. The Democratic NationalConvention Starts, albeit virtually, on monday. What do you expect the messaging will look like . Well, joe bidens messaging has been fairly consistent from start to finish when he launched his campaign. He always said this is the battle for the soul of the nation. And its not very subtle. Of course, hes saying we have to take the country back from donald trump in his words. One thing well see is a wide spectrum of speakers. John kasich, former republican of ohio, who ran against donald trump, speaking on the same night as Bernie Sanders whos as progressive as they come. What the messaging is going to be is you dont have to be a liberal, you dont have a progressive to vote for joe biden. You have to just not like whats going on right now. Theres going to be a lot of messaging about the restoration of the soul of the nation in joe bidens words. Yeah, messaging on range there. Its becoming increasingly clear that this election will be unlike any other. Mailin ballots and the Postal Service itself are at the center of this political debate. Yeah. Will trumps hardball approach there have political repercussions . Yeah. I mean, its more of a voting issue than a political issue. Obviously voters dont like to hear that the Postal Service is having issues because people do rely on the Postal Service. What a lot of folks are very worried about is because of this pandemic theres going to be massive reliance on mailin ballots. If the Postal Service is underfunded as it currently is, it certainly looks like a lot of peoples votes may not be counted, or there might be big issues with that. Theres a lot of apprehension in the democratic side in particular, and now that President Trump has essentially come out and said that one of the reasons hes underfunding the Postal Service is because of mailin ballots, theres a real push in the democratic side to make sure that every ballot can be safely counted in enough time. And what looks very likely now is we may not know its unlikely that we will know the full extent of the vote in a lot of these swing states on election night. We should be preparing for an election week, especially if the Postal Service continues to have all these issues and doesnt get more funding. Okay, Gabe Debenedetti from new york magazine. Thank you so much. Appreciate it. Thank you. Stay with cbs news as we bring you live coverage of the Democratic National convention. It starts monday at 10 00, 9 00 central. The dangers of reopening classrooms to inperson learning are being felt at the university of North Carolina at chapel hill. Just days after classes resumed, at least ten students have tested positive for the coronavirus. And clusters originating at two campus dormitories. It comes as the country saw more than 64,000 new cases of the coronavirus on friday. The most in a single day this month. There are more than 5. 3 million infections in this country. Thats pushing the death toll to more than 168,000. Michael george is here in new york with the very latest. Michael, good morning. Reporter michelle, good morning. Here in the nations Largest School district, plans are under way to reopen in a month. The Teachers Union is calling for those plans to be delayed after reopenings in other parts of the country have gotten off to a rocky start. I say you want to open your schools, get out of the red. Do what you need to do. Close the bars. Wear your masks. Reporter dr. Anthony faucis visible frustration comes as the percentage positive test results in 34 states is higher than the recommended level for reopening, according to Johns Hopkins researchers. In some covid hot spot states, the experiment to put kids in classrooms and then see what happens has already backfired. Take this Elementary School in florida. 14 students are in quarantine two days after school started. We couldnt prepare for this situation, like the superintendent said the other day, theres no playbook on this. Reporter at Woodstock High School in georgia, nearly 300 students and teachers are in quarantine, forcing a countywide stop to inperson learning. Its unfortunate for the kids. Reporter now more than 2,000 students nationwide are quarantined. Bottom line, learning is nonnegotiable. But neither is safety. Reporter california, which now has the most cases in a single state, 600,000, is playing it safe. Nearly all of the 10,000 schools will not open, forcing six Million Students to learn on line. And some teachers like these ones in carrollton, texas, are stepping up, handing out computers and Internet Access cards needed for online learning. I dont have internet at home. Reporter brian de la cruz is among the estimated 15 of students in u. S. Households without highpeated internet. Id rat