Now to the race for the White House tightening 100 days out from Election day. A new ABC News Ipsos poll shows Vice President Kamala Harris getting a bounce. Her favorability rating up eight points in just one week. Several of the contenders vying to become Harris's running mate dominated the airwaves today and the campaign trail.

Here's ABC's White House correspondent Mary Alice Parks.

Tonight, both campaigns in high gear with no time to waste. Election Day just 100 days away. Vice President Kamala Harris has only been a presidential candidate for seven days, but her favorability rating has grown by eight points to 43%, according to our new ABC News Ipsos poll. Now, potential running mates jockeying to join the Harris ticket, blitzing the campaign trail and Sunday shows.

I had a great conversation with her and I pledged to her that no matter what the outcome of this process, that I'd be working hard for her and making sure that she wins in November.

From billionaire Illinois Governor JB Pritzker to the Hyatt hotel chain, to Transportation Secretary Pete Buttigieg out defending Harris.

I'm pretty sure voters are worried about the age and acuity of President Trump compared to Kamala Harris, who represents being a generation younger.

Harris celebrating a groundswell of support, claiming her campaign has raised $200 million in this last week. Since Biden dropped out and endorsed her.

In battleground states, people have been flooding our offices around the country to volunteer.

Former President Trump saying he's done with any idea of toning down the rhetoric after that assassination attempt.

We have a brand new victim. And honestly, she's a radical left lunatic.

Minnesota Governor Tim Waltz, beloved by unions and also rumored to be a top vp contender for Harris, unfazed arguing. Republicans say every Democrat is too liberal.

What a monster. Kids are eating and having full belly so they can go learn. And women are making their own health care decisions. Look, they're going to label whatever their going to label.

Trump's running mate, Ohio Senator JD Vance today dismissing the scrutiny that he's faced for past comments that he made about not liking Trump.

Donald Trump accepts that people can change their mind.

Now, Vice President Harris is expected to announce her running mate by August 7. That's when the Democratic Party is hoping to wrap up their formal nominating process. That process could actually begin as early as this week with a remote virtual roll call of delegates.

Lindsey, things are happening quickly. Mary Alice from the White House, thanks so much.