Floridas governor shouted down, blasted for his response early on. Also, nearly 100 people receiving false positive tests. And on opening schools in this country, the governor tonight who is opening schools and hes under fire after saying when children are infected, theyre going to go home and theyre going to get over it. After months of criticism, President Trump late today tweeting this image of himself wearing a mask. And the president reviving his white house briefings, beginning tomorrow. Amid poll numbers showing joe biden with a significant lead and americans questioning the president s handling of the virus. The other news this monday night, the deadly attack on the family of a federal judge. The alleged gunman dressed as a fedex delivery man. The judges son killed opening the door. Her husband was shot next. Hes in the hospital. And what authorities have now revealed tonight. There is also news coming in on the showdown in portland, oregon, tonight. Federal officers clashing with protesters. The oregon senator tweeting out videos, authorities forcinging a protester into an unmarked vehicle. Tonight, President Trump threatening to send federal officers to other major cities. The extreme heat. The feellike reading well over 100 . Much of the country. When does it break . And alex trebek tonight on his experimental treatment which he says will be his last. And the life and legacy of john lewis, in his own words tonight. Good evening and its great to e have you with us as we start another week together here. And we begin tonight with several fastmoving headlines involving the coronavirus here in the u. S. There is a glimmer of hope tonight. The promising results so far involving a vaccine from Oxford University, showing a double defense. Creating antibodies that researchers say neutralize the virus and prevent it from spreading within the body and tcells, white blood cells attacking the virus next. One of 23 vaccines in human trials. So, what is the timeline from here . Well get into that in a moment. And the numbers tonight. The coronavirus has now claimed nearly 141,000 lives in the u. S. Cases are rising in 40 states tonight. Florida remains the epicenter. More than 10,000 cases there for a sixth day in a row. That long line of cars waiting for tests in my yamme dade county. The governor was shouted cown at his News Conference today. Protesters shouting shame on you for his response. Texas with more than 7,000 new cases and 62 more depths today. And of course, the debate over sending children back to school in this country. One governor, who is opening schools, under fire for saying if children get it, theyll go home and get over it. We will carefully get to it all again tonight, and we begin with new promise and that vaccine trial and tom llamas leads us off. Reporter tonight, with more than 14 million cases of covid19 around the globe, a potential breakthrough in the race to develop the first vaccine. A new study published in the lancet finding the experimental oxford vaccine, one of 23 vaccines currently in human trials, appears safe and activates the immune system to respond to the virus. Its both arms of the immune system and we think that gives us our best chance of getting good protection. Reporter more than 1,000 volunteers between 18 to 55 years old participating in the Oxford University study. I dont want to be sitting down not doing anything when i could potentially help out, as well. This vaccine is vital to be able to return to normalcy. Reporter the study finding the vaccine produces a double defense. Antibodies that neutralize the virus and prevent it from spreading within the body. And tcells, white blood cells that attack the virus. Right now, the vaccine in phase three trials, on track to be the first to be widely produced. The u. S. Government investing 1. 2 billion in the oxford vaccine, developed by astrazeneca, ordering 300 million doses. But even if it is proven effective to protect against the coronavirus, doctors warn, for it to work, people need to be willing to get it. Everything about this pandemic has become politicized. Do you see the vaccine becoming politicized . Im hoping that political leaders across the entire political aisle not turn this into a you know, red state or blue state issue. Reporter the study finding limited side effects, especially when volunteers took acetaminophen. And with no signs of the pandemic slowing down, the oxford researchers say they know the pressure is on to create an effective vaccine as quickly and safely as possible. We feel that theres urgency and pressure, really, every day, so people are working day and night, theyre working weekends. And were not going to stop until we get an answer. Now, david, most experts believe the vac seen could be ready by the end of the year, early 2021, but we have to remember, it is first going to be made available to the most vulnerable in our population, widely available to all americans possibly as early as the spring. David . All right, tom llamas leading us off tonight. Tom, thank you. Of course, cases rising in 40 states tonight. The trouble with testing and the raging debate continuing over opening schools. And what one governor said about children who might get the virus. What will then happen . Abcs Victor Oquendo on that part of the story tonight. Reporter tonight, at the epicenter of the pandemic in america, this mileslong line for testing in miamidade county. Florida is one of 40 states where cases are rising. More than 10,000 new cases for the sixth day in a row. You if had been same on you, ron desantis. If you had been infected reporter protestors frustrated with floridas governor, drowning him out at his News Conference today. Just months ago, he scolded the media for overhyping the virus. Wait two weeks, florida is going to be next, just like italy. Wait two weeks. Well, hell, were eight weeks away from that, and it hasnt happened. Reporter today, he mad an urgent plea for plasma. Your plasma will be able to be used to help other patients. Reporter one Florida Sheriffs Department says despite a ban on large gatherings, theyve broken up several huge block parties recently like this one that went past 2 00 a. M. Earlier this month. There are growing concerns at the villages, floridas largest retirement community, where cases and hospitalizations are on the rise. And tonight, with the nationwide demand for testing and fast results at an alltime high, Public Health officials in connecticut confirm 90 people received false positives, many of them nursing home residents, due to a flaw in their testing system. Theyre now reaching out to impacted patients. Across the country, 39 states reporting an increase in hospitalizations. Some pushed to the brink. In hidalgo county, texas, patients are waiting up to ten hours before an initial exam. Its very difficult when you are putting your moms best friend in a body bag. Reporter john place spent 17 days on ventilator after the virus spread through his entire florida household. His son contracted the virus at a friends house. Theyre not understanding that if they walk out again and infect somebody else and bring it home, especially if they live in a multigenerational home, other people arent going to be so lucky. Reporter and with the school year fast approaching, the debate is raging over how to get kids back to school. In missouri, governor mike parson defending his decision to reopen them this fall. And if they do get covid19, which they will, and they will when they go to school, theyre not going to the hospitals. Theyre not going to have to sit in doctors offices. Theyre going to go home and theyre going to get over it. Reporter in ohio, where there was an antimask rally at the state house over the weekend, Governor Mike Dewine now worried ohio could become the next florida. You look at our numbers today versus where florida was a month ago, we have very similar numbers. So were very, very concerned. Reporter local leaders are concerned here, too. There is now a strict 8 00 p. M. Curfew in effect. And if you dont wear a mask, david, youll get fined. Victor oquendo in florida tonight. Thank you, victor. And this evening, President Trump and the coronavirus, after months of criteria similar, he tweeted this photo of himself wearing a mask today. And what he said with that image. And the president also revealing hes now bringing back those day by Coronavirus Task force briefings, among polls showing joe biden with a significant lead and americans questioning the president s handling of the pandemic. Heres our chief White House CorrespondentJonathan Karl tonight. Reporter after weeks of saying little to nothing about the surge in covid19 infections across the country, the president says hes changing course. So i think what were going to do is, ill get involved and well start doing briefings. Reporter the move comes after his political advisers warned that if he doesnt convince more people he is taking the pandemic seriously, he is likely to lose in november. We had very successful briefings. I was doing them and we had a lot of people watching, record numbers watching. Reporter but those briefings abruptly ended not long after the president speculated about injecting disinfectants. Is there a way we can do Something Like that, by injection inside or almost a cleaning . Reporter the president shifted his focus to other subjects, referring to outbreaks of covid19 as embers that could easily be put out. Chris wallace of fox news challenged him on that. But this isnt burning embers, sir . This is a forest fire. No, no. But i dont say i say flames, well put out the flames. And well put out in some cases just burning embers. Florida became more flamelike, but its its going to be under control. Reporter he also called dr. Anthony fauci, the goves leading expert on the virus you an alarmist and said he opposed a National Mandate to wear masks. No, i want people to have a certain freedom, and i dont believe in that. No. Reporter but today, his Surgeon General said there is no threat to freedom in asking someone to wear a mask. Im begging you, please understand that we are not trying to take away your freedoms when we say wear a face covering. Reporter and later, three months after the cdc recommended people wear masks, the president tweeted this picture, saying, many people say that it is patriotic to wear a face mask when you cant socially distance. There is nobody more patriotic than me. Congress is now debating another Coronavirus Relief bill. Both democrats and republicans want to include billions of dollars for the states to expand testing. Also more money for the cdc and the nih. The white house has proposed stripping all that money from the bill, saying theres already unspent funds in the pipeline, but that is not going to fly. I talked to Congressional Republicans tonight who said that that bill will almost certainly include more money for testing and the cdc and nih. David . Of course, well track it. Jon, thank you. Now, to the other news this monday night, and the deadly attack on the family of a federal judge. The allege ed gunman shot and killed the judges son at the front door, then shooting her husband. Hes in the hospital tonight. And . Evening, what were now learning about the suspect. Heres abcs Stephanie Ramos from new jersey. Reporter tonight, the mystery deepening into the brazen, daytime shootings at the new jersey home of federal judge esther salas, by a man dressed in a fedex uniform his face covered. 5 00 p. M. Sunday, Authorities Say judge salass 20yearold son daniel answers the door and is shot and killed. Salass husband, mark anderl, is also shot and survives. The suspect spotted by a neighbor, walking away calmly. Hes not like running and someones following him not that way. Sad. Really sad. Reporter then today, in liberty, new york, 100 miles north of the crime scene, Law Enforcement sources say the alleged shooter had been found dead in a car from apparent selfinflected gunshot. That suspect, Law Enforcement sources identifying as manhattan lawyer and selfdescribed antifeminist, roy den hollander. In 2015, he represented a woman before judge salas who wanted to register for the military draft, but was replaced for unknown reasons june of 2019. Hes also known for suing manhattan nightclubs over ladies night discounts. Telling abc news in 2007 im now trying to turn these tables of equality on the feminazis who have changed this country. Reporter judge salas was reportedly in the basement at the time of the shootings and not harmed. Authorities are investigating any connections to hollander, besides the 2015 case and if he made any threats. David . Stephanie, thank you. In washington today, the tribute for congressman john lewis. And emotional moment of silence from his colleagues in the house of representatives. Speaker nancy pelosi asked everyone present and staff throughout the capitol to remember the civil rights leader who went on to be called the conscience of the congress. The chamber breaking out in a spontaneous round of applause afterward. And john lewis, in his own words, right here, later in the broadcast tonight. In the meantime, next, to the standoff in portland, oregon. Federal Law Enforcement officers taking some protesters off the street by force. And what the president is now saying. Abcs Kayna Whitworth from portland. Reporter tonight, a city on edge. Over the weekend, some demonstrators responding to the president s deployment of federal agents, officially there to protect federal property, clashing on the streets. Video tweeted out by oregon senator jeff merkley shows a protester being detained and placed in an unmarked mini van. Customs and Border Protection officials saying its agents took the action in the video because the protester was suspected of assaults against federal agents or destruction of federal property and that the suspect was moved to a safer location for further questioning. 29yearold Mark Pettibone saying something similar happened to him. I feared for my life and i ran and they eventually caught up with me and pulled me into the van. Reporter city and state officials demanding the removal of agents. This morning, the president saying he could consider sending agents to other major american cities. Were not going to let new york and chicago and philadelphia and detroit, baltimore and all oakland is a mess. We are not going to let this happen in our country. Reporter city and Community Leaders here are calling for an end to the violence. David . All right, Kayna Whitworth, thank you. And a note involving abc news tonight. The chairman of Walt Disney Television issuing a statement about the Senior Vice President for talent and business a fairs at abc news. After allegations and press accounts, rice now saying, quote, outside counsel has completed its independent investigation of the allegations. The investigation stang yated that she kid make some of the unacceptable racially insensitive comments attributed to her. It substantial yated that she mangled in a rough manner an used crass and inappropriate language. Lastly, rice says the investigation now bay sils for the claims that she was the subject of dozens of hr co complaints and that abc news spent millions of dollars in confidential settlements. He adds, although she made contributions over the 20year span of her career, in light of the overall finds, we have determined she can no longer serve in a leadership role and will not be returning to abc news. Peter rice adding tonight, we have committed to working together to build on what we have learned from the investigation and foster an environment that is fair, just and welcoming to all. When we come back tonight, the dangerous heat. The warnings this evening. When will it all break . And what alex trebek has now revealed in a new interview. Every day. People are surprising themselves the moment realize they can du more with less asthma. Thanks to dupixent, the addon treatment for specific types of moderatetosevere asthma. Dupixent isnt for sudden breathing problems. It can improve lung function for better breathing in as little as 2 weeks and help prevent severe asthma attacks. Its not a steroid but can help reduce or eliminate oral steroids. Dupixent can cause serious allergic reactions including anaphylaxis. Get help right away if you have rash, shortness of breath, chest pain, tingling or numbness in your limbs. 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