Vice President Kamala Harris rolled out an aggressive $50 million, three-week advertising blitz for the first ad of her presidential campaign on Tuesday, in which she introduces herself to voters, highlights her career and takes hits at former President Donald Trump.

"The one thing Kamala Harris has always been: fearless," a narrator says at the start of the minute-long ad, as pictures of Harris over the years -- from a toddler to college graduate to vice president -- flash on screen.

"As a prosecutor, she put murderers and abusers behind bars," the narrator continued. "As California's attorney general, she went after the big banks and won $20 billion for homeowners. And as vice president, she took on the big drug companies to cap the cost of insulin for seniors. Because Kamala Harris has always known who she represents."

The spot then leads into laying out Harris' vision and attacking Trump, using footage from her first rally of the campaign last week in a high school gym just outside Milwaukee, Wisconsin.

"We believe in a future where every person has the opportunity not just to get by, but to get ahead. Where every senior can retire with dignity," Harris said in the footage from the rally. "But Donald Trump wants to take our country backward, to give tax breaks to billionaires and big corporations and end the Affordable Care Act."

"But we are not going back," she added.

Harris campaign chair, Jen O'Malley Dillon, said in a statement that because of Harris' prosecutorial, congressional and vice-presidential experience, the vice president is "uniquely suited to take on Donald Trump, a convicted felon who has spent his entire life ripping off working people, tearing away our rights, and fighting for himself."

-ABC News' Gabriella Abdul-Hakim, Fritz Farrow, Isabella Murray and Will McDuffie

The "White Dudes for Harris" livestream held on Monday night raised over $4 million over three hours in support of Vice President Kamala Harris’ presidential bid, organizers said.

The event featured participants from politics and a parade of celebrities -- including "The Dude" himself, "The Big Lebowski's" Jeff Bridges -- all making their own call to action for other white men to step up in their support for Harris.

Over 190,000 people tuned into the Zoom call, organizers of the unofficial event said at the conclusion of the stream.

Among the recognizable faces that cropped up during the livestream were "Star Wars" icon Mark Hamill, "Supernatural" alum Misha Collins, "The West Wing" alum Bradley Whitford, "Frozen's" Josh Gad and singer Josh Groban. Several potential running mates for Harris also joined the event, including North Carolina Gov. Roy Cooper, who withdrew from contention for vice president on the Democratic ticket around the time he spoke at the meeting. He did not mention his withdrawal on the call.

Minnesota Gov. Tim Walz, Transportation Secretary Pete Buttigieg, Illinois Gov. JB Pritzker and Michigan Sen. Gary Peters, all still in the running for Harris' vice-presidential pick, were also part of the "White Dudes for Harris" meeting.

-ABC News' Oren Oppenheim, Isabella Murray and Brittany Shepherd

Sen. JD Vance, running mate to former President Donald Trump, said over the weekend that Kamala Harris moving to the top of the Democratic ticket was a "sucker punch," according to the Washington Post.

"All of us were hit with a little bit of a political sucker punch," Vance said to donors over the weekend in Minnesota, per an audio recording the paper said it had obtained. "The bad news is that Kamala Harris does not have the same baggage as Joe Biden, because whatever we might have to say, Kamala is a lot younger. And Kamala Harris is obviously not struggling in the same ways that Joe Biden did."

When asked about the report and Vance's "sucker punch" comment, a spokesperson for the vice presidential contender took aim at Harris.

"Poll after poll shows President Trump leading Kamala Harris as voters become aware of her weak, failed and dangerously liberal agenda. Her far-left ideas are even more radioactive than Joe Biden, particularly in the key swing states that will decide this election like Pennsylvania, Michigan, and Wisconsin," Vance spokesperson William Martin said in a statement.

-ABC News' Hannah Demissie

North Carolina Gov. Roy Cooper issued a statement on Monday night signaling that he's removed himself from contention as a vice presidential running mate for presidential candidate Kamala Harris.

"I strongly support Vice President Harris' campaign for President. I know she's going to win and I was honored to be considered for this role. This just wasn't the right time for North Carolina and for me to potentially be on a national ticket," he said in a post on X.

"As l've said from the beginning, she has an outstanding list of people from which to choose, and we'll all work to make sure she wins," he added.