Tonight a whole new race for president Democrats rallying around Kamala Harris

after Joe Biden stepped aside. The vice president greeted with cheers at what

is now her campaign headquarters in Delaware. It comes as Nancy Pelosi adds her name

to the list of top Democrats backing Harris after President Biden dropped out and

endorsed her. In just 24 hours her campaign raking at a record $81 million in donations and the

questions how will all this work with the Democratic Convention less than a

month away and who will Harris pick as a running mate and the

shake up forcing the Trump campaign to pivot attacks to Harris. J.D. Vance in

his first solo debut as Donald Trump's running mate saying he's annoyed he won't get a debater

as top Republicans demand Mr. Biden leave office now.

Also tonight the director of the Secret Service grilled on Capitol Hill saying quote we failed on the day a gunman tried to assassinate Donald Trump.

The disturbing body cam and Illinois woman fatally shot in her home after she called 911.

The deputy now charged with murder.

I just four days to go, a historic team USA honor for LeBron James as Simone Miles and her teammates arrive in Paris

to begin their quest for gold.

This is NBC Nightly News with Lester Holt.

Good evening and welcome.

How the Political Universe has shifted just a day after President Biden's

exit from the presidential contest,

Vice President Kamala Harris,

riding a wave of Democratic Party endorsements,

is taking her place as the front runner for the nomination.

...