I'm Brian Rosenthal. I'm an investigative reporter at the New York Times. My dad is a scientist.

My career has been devoted to scientific teaching and research.

I remember growing up, I didn't fully understand what he was doing every day. But now that I work as an investigative journalist, I do understand.

So you have to start with facts. From those facts, a hypothesis appears, and then you work on trying to to test that hypothesis.

I do the same thing, obtaining documents, crunching the data, and I talk to as many people as possible to get to the bottom of the story. The New York Times does not publish until we can prove that something is true. The best scientists are able to do that deep work because they receive funding from their university or from the government. We, as journalists, depend on funding from subscribers. You can support that type of work by subscribing to the New Times.

From New York Times, I'm Michael Bivarro. This is The Daily. Today.

Vice President Kamala Harris riding a wave of Democratic Party endorsements, taking her place as the front runner for the nomination.

Bill and Hillary Clinton writing, Now is the time to support Kamala Harris and fight with everything we've got to elect her.

As Democrats, after Democrat, races to annoy Kamala Harris as President Biden's replacement.

There are now six Democratic governors who have endorsed Kamala Harris's presidential bid.

California Governor, Gavin, Newsom, Pennsylvania Governor, Josh Shapiro. Former House Speaker, Nancy not want Joe Biden to run for a second term. But when he did, they all stepped aside and gave him a glide path the nomination anyway. The result that they got was a deeply flawed nominee who couldn't make it to the finish line. Now, it's so late in the game that there's no time to have a real competition to replace him.Reeve, thank you very much.Thank you, Michael.On Monday night, a majority of Democratic delegates endorsed Vice President Harris as Biden's replacement, and she moved quickly to assert herself as the de facto Democratic nominee. Harris asked former attorney general, Eric Holder, to oversee her choice of a running maid, and persuaded the current leadership of Biden's campaign to remain in place and run her campaign against Trump.And in this campaign, I will proudly, I will proudly put my record against his.Finally, in her first campaign speech, Harris took Trump on directly, invoking her history as a lawyer and a prosecutor.In those roles, I took on perpetrators of all kinds. Predators who abused women, fraudsters who ripped off consumers, cheaters who broke the rules for their own gain. So You hear me when I say, I know Donald Trump's type.We'll be right back. Here's what else you need to know today.The Secret Service's sole mission is to to protect our nation's leaders.On July 13th, we failed.During a heated Congressional hearing on Monday, Secret Service Director Kimberly Cheetal faced angry questions about her agency's plan to protect Donald Trump on the day when he was shot, but she repeatedly declined to answer basic inquiries about his security.Do you really believe that the majority of this country has confidence in you right now?As a result, lawmakers from both parties told Chetel that she had lost their confidence.Well, look, I believe, Director Chetel, that you should resign. I think there are colleagues on both sides of the aisle who believe that, and I hope you'll consider it.Today's episode was produced by Eric Kruvke, Diana Wyn, Claire Tennisgetter, Lindsay Garrison, and Muj Zady. It was edited by Patricia Willens and Paige Cawet, contains original music by Marion Lozano and Diane Wong, and was engineered by Chris Wood. Our theme music is by Jim Brunberg and Ben Lantferk of WNDYRLE. That's it for the Daily. I'm Michael Barbaro. See you tomorrow.

not want Joe Biden to run for a second term. But when he did, they all stepped aside and gave him a glide path the nomination anyway. The result that they got was a deeply flawed nominee who couldn't make it to the finish line. Now, it's so late in the game that there's no time to have a real competition to replace him.

Reeve, thank you very much.

Thank you, Michael.

On Monday night, a majority of Democratic delegates endorsed Vice President Harris as Biden's replacement, and she moved quickly to assert herself as the de facto Democratic nominee. Harris asked former attorney general, Eric Holder, to oversee her choice of a running maid, and persuaded the current leadership of Biden's campaign to remain in place and run her campaign against Trump.

And in this campaign, I will proudly, I will proudly put my record against his.

Finally, in her first campaign speech, Harris took Trump on directly, invoking her history as a lawyer and a prosecutor.

In those roles, I took on perpetrators of all kinds. Predators who abused women, fraudsters who ripped off consumers, cheaters who broke the rules for their own gain. So You hear me when I say, I know Donald Trump's type.

We'll be right back. Here's what else you need to know today.

The Secret Service's sole mission is to to protect our nation's leaders.

On July 13th, we failed.

During a heated Congressional hearing on Monday, Secret Service Director Kimberly Cheetal faced angry questions about her agency's plan to protect Donald Trump on the day when he was shot, but she repeatedly declined to answer basic inquiries about his security.

Do you really believe that the majority of this country has confidence in you right now?

As a result, lawmakers from both parties told Chetel that she had lost their confidence.

Well, look, I believe, Director Chetel, that you should resign. I think there are colleagues on both sides of the aisle who believe that, and I hope you'll consider it.

Today's episode was produced by Eric Kruvke, Diana Wyn, Claire Tennisgetter, Lindsay Garrison, and Muj Zady. It was edited by Patricia Willens and Paige Cawet, contains original music by Marion Lozano and Diane Wong, and was engineered by Chris Wood. Our theme music is by Jim Brunberg and Ben Lantferk of WNDYRLE. That's it for the Daily. I'm Michael Barbaro. See you tomorrow.