Election 2024 updates: Gov. Andy Beshear says JD Vance 'ain't from Appalachia' while campaigning for Harris

Harris is scheduled to visit Houston on Thursday to deliver the keynote speech at the American Federation of Teachers’ 88th national convention, according to the campaign.

"The Vice President’s speech to educators from communities throughout the nation is a continuation of her consistent efforts to fight for workers across America, including as Chair of the White House Task Force on Worker Organizing and Empowerment," the campaign said in a statement.

-ABC News' Cheyenne Haslett

The Planned Parenthood Action Fund announced Tuesday that it will support Harris's presidential bid, citing her work promoting women's reproductive rights.

"Here’s the undeniable truth: Vice President Kamala Harris is the only person running for president that we can trust to protect access to abortion," Alexis McGill Johnson, the president and CEO of Planned Parenthood Action Fund, said in a statement.

-ABC News' Ely Brown

The Congressional Black Caucus PAC (CBCPAC) extended its enthusiastic endorsement of Harris as the presumptive Democratic presidential nominee during a press conference Tuesday.

Chair Gregory Meeks, D-N.Y., expressed the caucus' "full and unanimous support."

"She is the most experienced individual for our safety and security around the world," he said. "She has more experience than any of the past four presidents before President Biden. She's the right person at the right time to get the job done."

The caucus also highlighted recent Zoom calls in which thousands of Black women continue to organize support efforts on behalf of Harris.

Rep. Joe Neguse, D-Colo., explained that he "cannot wait" to hold his 5-year-old daughter's hand and "see this incredibly talented Black woman become President of the United States of America."

-ABC News' Emily Chang

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