Kentucky Gov. Andy Beshear spoke on Sunday at the opening of Kamala Harris' campaign office in Forsyth County, Georgia.

The possible VP pick for Harris has been an effective surrogate for the vice president’s White House bid over the weekend, coming to the metro Atlanta event fresh off of a stump in Iowa on Saturday night.

The red-state governor introduced himself to the Southern audience on Sunday while boosting Harris’ candidacy and taking a number of swipes at Trump’s Vice Presidential pick, JD Vance.

"Are you ready to beat Donald Trump? Are you ready to beat JD Vance? Are you ready to elect Kamala Harris president of the United States of America?" Beshear asked the crowd, adding, "Let's win this race,"

"Let me tell you just a bit about myself," Beshear said. "I'm a proud pro-union governor. I'm a proud pro-choice governor. I am a proud pro-public education governor. I am a proud pro-diversity governor and I'm a proud Harris for president governor," he added.

Calling out Vance, Beshear said, "Just let me be clear. JD Vance ain't from Kentucky. He ain't from Appalachia. And he ain't gonna be the vice president of the United States."

-ABC News' Isabella Murray

Former Vice President Al Gore endorsed Vice President Kamala Harris on Sunday.

"As a prosecutor, [Kamala Harris] took on Big Oil companies -- and won. As [VP], she cast the tie-breaking vote to pass the most significant investment in climate solutions in history, the Inflation Reduction Act. That's the kind of climate champion we need in the White House," he wrote on X.

"With so much at stake in this year's election -- from strengthening democracy in the US and abroad, to expanding opportunity for the American people, to accelerating climate action -- I’m proud to endorse Kamala Harris for President," he added.

-ABC News' Oren Oppenheim

During a quick stop at a diner in Minnesota on Sunday morning, Sen. JD Vance on Sunday spoke about his past criticisms of former President Donald Trump.

When asked by ABC News if he and Trump have talked about his past criticism of the former president, Vance said yes, adding that Trump "doesn't care about what I said eight years ago."

"I mean, look, President Trump and I have talked a lot about this," Vance said. "In fact, I sometimes joke that I wish that he had the memory of Joe Biden, because he's got a memory like a steel trap, and he certainly remembers criticisms that people have made."

"But this is where the media, I think, really misses Trump -- Donald Trump accepts that people can change their mind, and you ask, 'Why did I change my mind on Donald Trump?' Because his agenda made people's lives better," Vance said.

"This whole thing is not about red team versus blue team or winning an election for its own sake. It's about getting a chance to govern so that you can bring down the cost of groceries, close that border and stop the fentanyl coming across our country for four years,” Vance continued, saying he was "wrong" about Trump.

"He did a better job of that than anybody that I've ever seen as president in my lifetime. So I changed my mind, because he did a good job. And that's what you do when people do a good job and you're wrong. I've talked to President Trump a lot about it, but look, he, I mean, he just, he doesn't... He doesn't care about what I said eight years ago. He cares about whether we together [and] can govern the country successful.”

When asked again if the two have talked about the subject, specifically in the last week since his comments have resurfaced, Vance admitted that they haven't spoken about it and their conversations have focused on the race ahead.

-ABC News' Kelsey Walsh, Soorin Kim and Hannah Demissie

Vice President Kamala Harris' campaign raised more than $200 million in less than a week, with more than two-thirds of the total coming from first-time donors, the campaign said Sunday.

The total raised amounts to a "record-shattering haul," the campaign said. ABC News is unable to independently verify the numbers until they've been filed with the Federal Election Commission.

Harris, who has crisscrossed the country since President Joe Biden's endorsement last Sunday, held the campaign's largest rally to date in Milwaukee on Tuesday.

Her campaign said it would host more than 2,330 events in battleground states this weekend to mark 100 days until the Nov. 5 election.

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

A coalition of major gun safety groups announced their joint endorsement Tuesday of Harris' bid for the top of the ticket, framing the choice for who holds the Oval Office as a matter of grave safety.

The coalition included Everytown for Gun Safety and its grassroots networks Moms Demand Action and Students Demand Action, as well as Newtown Action Alliance and Community Justice Action Fund.

"Throughout her career in public service, Vice President Harris has been a powerful force in the fight for our freedoms -- including the freedom to live free from the threat of gun violence. Gun extremists have a dream ticket with Trump and Vance, and our volunteers stand ready to do everything in our power to elect Vice President Harris back into the White House," Angela Ferrell-Zabala, executive director of Moms Demand Action, said in a statement to ABC News.

Everytown backed the Biden-Harris ticket last year. Brady, another gun-control group, which backed Harris on Sunday, also reiterated its support Tuesday.

"A vote for Kamala Harris is a vote to free America from the grips of gun violence. This November, our lives are on the ballot," Kris Brown, the president of Brady, said in a statement.

Similar groups, Team ENOUGH and GIFFORDS -- founded by Gabby Giffords -- are also endorsing Harris. Giffords' husband is Arizona Sen. Mark Kelly, who a source tells ABC News is among a list of vice presidential hopefuls being vetted to be her running mate.
Lauding the Biden-Harris administration's work on gun safety, some of the groups specifically highlighted the work Harris has already done to address gun violence nationwide -- and in Black and Hispanic communities.
"Everything we've worked towards could be rolled back on day one with the wrong administration in charge," José Alfaro, executive director of the Community Justice Action Fund, said in a statement. "As Vice President, Harris has shown unwavering dedication to addressing gun violence nationwide as a public health issue, investing hundreds of millions of dollars in community violence intervention and leading the first-ever White House Office of Gun Violence Prevention. These acts carry on the legacy of Black women, pushing, fighting, and willing change to happen in the gun violence prevention movement."
-ABC News' Sasha Pezenik