Trump participated in early voting in Florida's primary election at a polling location near his home in Palm Beach.

"Well, thank you very much, great honor to vote, done a fantastic job here, and we appreciate it," Trump said as he walked out of the polling site.

Asked by reporters what the FBI had told him about the purported hack of his campaign's email, Trump said, "They're looking at it, and they're doing it very professionally."

He then insisted "it looks like it's Iran," while declining to say whether the FBI had told him it was Iran that hacked his campaign.

Trump also dodged questions about falsely accusing the Harris campaign of using AI-altered images to manipulate crowd sizes.

"I can't say what was there, who was there. I can only tell you about ours," he said. "We have the biggest crowds ever in the history of politics. We have crowds that nobody has ever seen before, and we continue to have that. We have a level of enthusiasm that nobody has seen before. They want to make America great again."

-ABC News' Soorin Kim, Lalee Ibssa and Kelsey Walsh

The former president announced Wednesday morning that he will hold a press conference in Bedminster, New Jersey, on Thursday.

The presser is scheduled to begin at 4:30 p.m. ET.

Trump held a press conference last week at his Mar-a-Lago estate in Florida, where he repeated numerous falsehoods as he criticized Harris.

Speaking to AFSCME members in Los Angeles on Tuesday, Minnesota Gov. Tim Walz claimed he was the "first union member on a presidential ticket since Ronald Reagan."

That claim is false: former President Donald Trump was a SAG-AFTRA member until he resigned in 2021 after the union's national board found probable cause that Trump violated the group's constitution by his actions on Jan. 6.

Trump was for years a member of the union, which represents more than 160,000 performers across a variety of media platforms, by virtue of his various appearances in films and television shows. He reported earning a pension from the union in his financial disclosures.

At a fundraiser later Tuesday, Walz repeated the claim, apparently unaware it was false.

Prior to his two terms as California governor, Reagan served twice as president of the Screen Actors Guild.

ABC News has reached out to the Harris-Walz campaign for comment.

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

Vice President Harris and Minnesota Gov. Tim Walz will take a bus tour through Pennsylvania on Sunday right before their appearance at the Democratic National Convention (DNC), ABC News has confirmed.

Sunday's tour, first reported by CNN, will begin in Pittsburgh and will be the first time Harris, Walz and their spouses will appear on the campaign trail together. According to the campaign, they aim to have a cluster of intimate events with voters, ranging from canvass kick-offs to stops at local retail shops.

-ABC News’ Gabriella Abdul-Hakim, Fritz Farrow and Will McDuffie