Musk has also embraced conspiracy theories pushed by Trump, and is spinning some of his own.
He revived false theories claiming that voting machines rig elections - an assertion that has been repeatedly debunked since it was pushed by those seeking to overturn Trump's 2020 loss.
He mentioned Dominion Voting Systems, which sued Fox News in 2021 for defamation over false claims that the company engaged in a vote-rigging conspiracy. Dominion agreed to a landmark
$787 million settlement with the network.
"There's always a sort of question of like, say, the Dominion voting machines. It is weird that the, you know, I think they're used in Philadelphia and in Maricopa County (Arizona), but not in a lot of other places."
In a statement,
Dominion pointed to inaccuracies in Musk's comments, including the fact they don't operate in Philadelphia.
Musk also accused Democrats of channeling vast numbers of migrants who enter the U.S. illegally into battleground states.
Presenting no evidence, he alleged that Harris would legalize the migrants after the election if she wins, giving Democrats clear majorities in those states.
The Harris campaign did not immediately respond to requests for comment.
Similar claims have been debunked in the past.
For many at the events, the idea the 2020 election was stolen from Trump was taken as fact despite a lack of evidence.
One attendee in Harrisburg asked Musk what he was doing to prevent a recurrence. Musk responded by leaning into the unfounded allegations.
“I mean if the margin of victory is high enough, then I think it can exceed any sort of cheating that may take place. So we're going to aim for just a massive margin,” Musk said.
He encouraged people to use his X platform, formerly known as Twitter, to shine a spotlight on potential election cheating.
“If people think there's a fraud, then they should post the images, post the videos, post the evidence," he said.
Musk has millions of dollars in government contracts and his companies face significant and at times costly government regulations which typically are designed to protect things like consumers, drinking water and wildlife.
Musk was asked if as part of a Trump administration he would take a flamethrower to stacks of regulations and post a video of it. "I think a bonfire of nonsense regulations would be epic," Musk said.
Musk recounted how SpaceX was forced to conduct a study to determine whether his rockets would hurt sharks when landing in the water.
"I'm like, it's a big ocean, you know, there's a lot of sharks. It's not impossible, but it's very unlikely," Musk said.
Reluctantly, they conducted the study only to be told to do a similar review on potential threats to whales, Musk said.