Live 2020 Updates: Trump Trades Attacks With Biden and Harris

President Trump and his allies have spent the months since Joseph R. Biden Jr. emerged as the presumptive Democratic nominee cycling through a variety of messages in hopes of denting the reputation of the former vice president.

They have called him soft on China and questioned his mental agility. They have tried to cast him as too tough on crime (at least in appeals to Black voters) and at the same time as anti-police. More recently, the Trump campaign has framed Mr. Biden, who ran throughout the Democratic primary as a moderate, as a captive of the “radical left.”

And on Thursday morning, the president, who twice mispronounced the word “fatality” during an appearance on Wednesday, questioned his opponent’s mental acuity.

“Joe doesn’t even know he is alive,” Mr. Trump said during a high-volume one-on-one with Maria Bartiromo of the Fox Business Network, a sympathetic interview that ended with each praising the other.

None of these slights have particularly stuck as Mr. Biden has maintained a steady lead in the polls.

The early stages of trying to define Kamala Harris, Mr. Biden’s vice-presidential pick, have been similarly scattered, while simultaneously infused with charged language specific to her role as the first woman of color to be part of a major party’s presidential ticket.

On Thursday, Mr. Trump continued to ridicule Ms. Harris, trying out another one of his derogatory nicknames on the California senator — a practice that some Republican officials worry will backfire among suburban women who will see such an attack as sexist.

“Now you have sort of a mad woman, I call her, because she was so angry and such hatred with Justice Kavanaugh,” he told Ms. Bartiromo. “I mean, I’ve never seen anything like it. She was the angriest of the group and they were all angry. They’re all radical left angry people.”

The Biden campaign, for its part, has focused on Mr. Trump’s handling of the simultaneous crises that have erupted in 2020: the coronavirus pandemic, the resulting economic downturn and the national protests after the killing of George Floyd in police custody.

On Wednesday, Ms. Harris simply stepped in as a new messenger. “There’s a reason it has hit America worse than any other advanced nation,” she said of the pandemic. “It’s because of Trump’s failure to take it seriously from the start.”

Those attacks may be potent: Fifty-seven percent of Americans say Mr. Trump is doing a bad job dealing with the virus, and 52 percent say the United States’ response is worse than other countries’, according to a Monmouth University poll released Thursday.

Mr. Biden and Ms. Harris are scheduled to receive a briefing from public health experts on the virus today, then speak to reporters.

Attorney General William P. Barr has been a defiant defender of President Trump — to a fault, his critics say. But on Thursday, Mr. Trump floated the idea that Mr. Barr might not be doing enough.

In an interview on the Fox Business Network, Mr. Trump suggested that Mr. Barr and the F.B.I. director, Christopher Wray, needed to take more forceful roles in steering the supposedly impartial investigation into whether the Obama administration targeted Mr. Trump during the 2016 election toward the result the president wants.

“Bill Barr has a chance to be the greatest of all time, but if he wants to be politically correct, he’ll be just another guy, because he knows all the answers,” Mr. Trump said of Mr. Barr, who assigned John Durham, the U.S. attorney for Connecticut, to investigate the matter in May.

This is amply trampled ground: Mr. Trump drove out Jeff Sessions, his first attorney general, largely for being insufficiently zealous in investigating the F.B.I.’s probe of possible collusion between his campaign and Russia.

During his interview with Maria Bartiromo, Mr. Trump said that Mr. Barr “knows what they have, and it goes right to Obama, it goes right to Biden,” referring to his unproven charge that Democrats conspired with James Comey, then the F.B.I. director, in a coordinated effort to “spy” on him four years ago.

Mr. Trump suggested that Mr. Wray, whom he appointed to replace Mr. Comey, had been reluctant to hand over evidence to Mr. Barr because he was “very, very protective” of the F.B.I. bureaucracy.

“I wish he was more forthcoming — he certainly hasn’t been,” Mr. Trump said.

“There are documents they want to get,” he added, referring to investigators, “and that we have said we want to get. We’re going to find out if he’s going to give those documents.”

Mr. Trump concluded by saying, “Let’s see how Wray turns out. He’s going to either turn out one way or the other.”

WILMINGTON, Del. — Joseph R. Biden Jr. and Kamala Harris made their debut as running mates in a high school gymnasium on Wednesday, pledging to lead the country out of the coronavirus crisis.

The first full day for the newly announced Democratic presidential ticket offered a glimpse of how two once-bitter rivals from opposite coasts and different generations will try to unite Americans around their candidacies. Projecting warmth toward each other, they sketched out a vision of recovery from the public health and economic catastrophes the nation is confronting — crises that, they argued, Mr. Trump has made worse at every turn with an extraordinarily divisive presidency.

Ms. Harris, a Californian who once served as attorney general of the state, made clear that part of her campaign role would be demonstrating her skills as a prosecutor to build a case against Mr. Trump and Vice President Mike Pence, methodically detailing what she cast as their failures in combating the coronavirus, reopening the economy and creating conditions under which schools could reopen safely this fall.

“Let me tell you, as somebody who has presented my fair share of arguments in court, the case against Donald Trump and Mike Pence is open and shut,” Ms. Harris said.

“This virus has impacted almost every country, but there’s a reason it has hit America worse than any other advanced nation,” she said. “It’s because of Trump’s failure to take it seriously from the start. His refusal to get testing up and running. His flip-flopping on social distancing and wearing masks. His delusional belief that he knows better than the experts. All of that is reason, and the reason, that an American dies of Covid-19 every 80 seconds.”

In the hours since Kamala Harris joined the Democratic presidential ticket, President Trump has responded by sorting women into two categories: the good “suburban housewife” he believes will vote for him, and nasty women who have not shown him or his political allies sufficient respect.

After Joseph R. Biden Jr. announced on Tuesday that Ms. Harris would be his running mate, Mr. Trump wasted no time sorting her into the “nasty” camp, a category also occupied by the last woman to run against him on a Democratic ticket.

“She was extraordinarily nasty to Brett Kavanaugh — Judge Kavanaugh then, now Justice Kavanaugh,” Mr. Trump said of Ms. Harris, using “nasty” or some version of the word no fewer than four times as he referred to Senate confirmation hearings held in 2018.

On Wednesday morning, after his allies on Fox News had spent the evening comparing Ms. Harris, who is of Jamaican and Indian descent, to unethical “time-share salesmen” and “payday lenders,” Mr. Trump crowed that the American “suburban housewife” — a label used by the president to play into white racist fears about neighborhood integration efforts — would be on his side in November.

“They want safety” Mr. Trump wrote on Twitter, adding that they “are thrilled that I ended the long running program where low income housing would invade their neighborhood,” referring to an Obama-era effort that encouraged diversification of American communities.

Halliestine Zimmerman, a 71-year-old retired accountant in Mauldin, S.C., has cast a ballot in every election since she came of voting age, having watched her mother work to get more African-Americans to vote in the 1950s.

“We are just benefiting from that — from our mothers,” she said on Wednesday, the morning after Kamala Harris was chosen as the first woman of color to run on a national presidential ticket. “It is amazing what I have seen in my lifetime.”

For Ms. Zimmerman, there was joy in the moment, in being able to point to Ms. Harris as a role model, one whom her grandchildren could see themselves in.

“There was a time when nobody thought this was possible,” she said. “It was time for the Democrats to recognize who brought them to victory and who brings them to victory every time — it is Black women.”

“Finally,” she added, “they are letting us know they hear us.”

That sense of jubilant vindication is just what a group of activists and strategists imagined hearing when they began a campaign that they hoped would make it impossible for Mr. Biden to choose anyone but a Black woman as his running mate.

But the same activists who organized the push are steeling themselves for the kinds of attacks likely to be aimed at a Black woman on the presidential ticket.

“It is going to be a long road to the White House,” said Moya Bailey, a professor at Northeastern University who coined the term misogynoir, referring to the way Black women experience both sexism and racism. “I do think that the way our country has shown its disregard for Black women will definitely come up in the weeks and months ahead.”

Joseph R. Biden Jr.’s choice of Kamala Harris as his running mate affirmed what many progressives had feared: that any potential Biden administration would govern the same way the former vice president had spent most of his career — firmly rooted in Democratic establishment politics.

But rather than revolt, many progressive activists and elected officials stifled their criticisms and proclaimed their support, reiterating that removing Mr. Trump from office was their priority. Even those prone to denouncing Mr. Biden and other moderates largely tried to make peace.

Larry Cohen, the chairman of the Bernie Sanders-aligned group Our Revolution, described Ms. Harris as “extremely competent.”

The declarations of enthusiasm underscore how delicately progressives are approaching this moment, as they try to balance demands for change with the understanding that Democrats across the spectrum must unite behind Mr. Biden to defeat Mr. Trump. They are also negotiating another political reality: that Ms. Harris could be the party’s face of the future, and that crossing her now will have political consequences that did not exist at the week’s outset.

Sara Nelson, president of the Association of Flight Attendants union and a Sanders ally, said she was focusing on how Ms. Harris, as California attorney general, had helped secure a nationwide settlement with big banks.

“When I think about this moment that we’re in, and I think about the fact that she was one of the A.G.s to take on the banks during the financial crisis and to stand up for working people — I’m hanging on to that right now,” she said. “I can get excited about that.”

YouTube will not allow the posting of hacked material meant to interfere with the 2020 election or this year’s census, the company said Thursday.

Leslie Miller, a vice president of government affairs at YouTube, said the service would remove hacked information that “may interfere with democratic processes.” She offered the example of videos “that contain hacked information about a political candidate shared with the intent to interfere in an election” as something the platform would take down.

In 2016, hackers released emails from an account used by John D. Podesta, then the chairman of Hillary Clinton’s presidential campaign. The emails spread online, helping to fuel conspiracy theories, and were widely covered by traditional media outlets. The hackers were linked to Russia, where American intelligence authorities say government officials executed a plan to interfere with the election.

YouTube, which is owned by Google, is not the only tech company to adopt a policy meant to stem the spread of hacked material. Twitter does not allow users to post hacked material or link to it in tweets. Facebook’s community standards forbid the posting, except in “limited cases of newsworthiness,” of “content claimed or confirmed to come from a hacked source, regardless of whether the affected person is a public figure or a private individual.”

All three tech companies are preparing for the possibility their services could be used for election interference in the coming months. On Wednesday, Facebook, Google and other companies said they were forming a group to promote collaboration with the government on securing the election.

Despite the platforms’ efforts at enforcement, they have often struggled to stem the tide of disinformation. Last week Facebook removed a video posted by Trump campaign in which the president claimed children were immune to the coronavirus, but only after it had been viewed nearly half a million times. And hackers seeking to influence the election could post information elsewhere, such as on their own websites.

CENTER OF THE WORLD, Ohio — As he stood outside a Dollar General store, loading groceries into his pickup, Dennis Kuchta pondered what it would mean not to have an Ohio State football season this fall because of the coronavirus.

“It’s a huge loss, and I don’t think people realize that yet,” he said.

With a pillar of autumn Saturdays missing, Mr. Kuchta and others in this football-mad northeastern corner of the state lookied for someone to blame.

“Trump just blew it,” Mr. Kuchta said. “He just didn’t handle it. He could have shut things down for five or six weeks and figured out what he was doing, but he never had a plan.”

That points to a potential problem for Mr. Trump, whose re-election efforts may well hinge on an earlier-than-expected return to normalcy across America.

In battleground states like Ohio, Michigan and Pennsylvania, where college football serves as an autumn religion, the Big Ten’s decision to postpone its season may be a political stain that the president is unable to blame on Democrats or the media.

“As great as politics is — it’s a sport that so many people enjoy watching — it’s not as important as college football in Ohio, in Georgia, in Alabama,” said Paul Finebaum, who hosts a syndicated college football radio show for ESPN. “Without it, people will be lost and people will be angry.”

Mr. Finebaum predicted that the loss of the season would damage Mr. Trump even among his most faithful supporters.

“We don’t have a day that doesn’t pass where someone doesn’t call up and blame the president,” he said. “Even from the South, I’ve heard more anger directed at the president than I thought.”

President Trump has complained before about the sorry state of the national water pressure. Now he is transforming grievance to governance, trying to roll back a regulation limiting flow through American-made shower heads.

Mr. Trump often eschews written briefing materials and ignores even basic policy matters, according to former administration officials. But he has often focused on minutiae pertaining to matters of personal importance, peeves emanating from his days as a developer and landlord. Low water pressure, often an issue in Manhattan high-rises, is one of them.

“So shower heads — you take a shower, the water doesn’t come out,” Mr. Trump said at a an event touting his business-friendly policies in July. “You want to wash your hands, the water doesn’t come out. So what do you do? You just stand there longer or you take a shower longer? Because my hair — I don’t know about you, but it has to be perfect. Perfect.”

A federal law enacted in 1992 mandates that new shower heads not be allowed to spritz more than 2.5 gallons of water per minute. The Obama administration, target of so many Trump-era anti-regulatory assaults, dictated that the 2.5-gallon cap be applied to the aggregated outpouring of all nozzles in modern-day multihead shower fixtures.

Mr. Trump’s Energy Department proposed a new rule on Wednesday that would allow each nozzle to pump out 2.5 gallons, with no restrictions on the total.

Environmental advocates say the plan is no trivial matter: It could lead to waste of water at a time when large sections of the country are grappling with multiyear droughts.