Biden talks about passing torch in address

Arizona Sen. Mark Kelly dodged questions from an ABC News reporter Tuesday about whether he received vetting materials for a potential vice presidential ticket.

"This is not about me," he said. "I'm going to be focused on doing everything I can to make sure she is elected because we cannot have a repeat of what we saw between 2016 and 2020."

Kelly is seen as one of the front-runners to be Vice President Harris' running mate, sources have told ABC News.

MORE | Who is Sen. Mark Kelly, a possible Harris VP pick?

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.

Harris rallied voters in battleground Wisconsin on Tuesday, her first presidential campaign event since securing enough delegate pledges for the Democratic nomination if they keep their word -- and used the rally to sharply frame her race against former President Donald Trump.

Harris attacked Trump and his running mate, Ohio Sen. JD Vance, on the issue of abortion and Project 2025, the conservative presidential transition blueprint fronted by the Heritage Foundation.

"We'll stop Donald Trump's extreme abortion bans because we trust women to make decisions about their own body and not have the government tell them what to do," Harris said to raucous applause. "And when Congress passes the law to restore reproductive freedoms, as president of the United States, I will sign it into law."

During the rally, Harris touted her previous experience while making a dig at Trump.

"In those roles, I took on perpetrators of all kinds: predators who abused women, fraudsters who ripped off consumers, cheaters who broke the rules for their own gain," she said. "So, hear me when I say, I know Donald Trump's type."

Biden briefly spoke with reporters as he boarded Air Force One at Dover Air Base on Tuesday.

The president, who tested negative for COVID-19, said he was "feeling well," and didn't respond to questions about bowing out of the race.

Biden had a mask in hand, which he placed in his pocket after he got out of the car before getting on the plane.

The president gave a salute and a thumbs up as he boarded.