Vice President Kamala Harris lashed out at Elon Musk on Monday as the billionaire tech entrepreneur spoke with her rival, former President Donald Trump, in a Spaces discussion on X.

An email from Harris’ presidential campaign, which contained links to online fundraising platform ActBlue, featured the headline, “The two worst people you know are live this evening.”

It took multiple swipes at Musk, saying, the “richest person in the world is a lackey for Team MAGA,” and claiming that Musk was “using his vast fortune and broad reach to try to control our democracy.”

President Trump has been speaking for over an hour to over a million people about his winning agenda for the American people.

Kamala is BIG MAD about this as she refuses to speak to the media, do an interview, or even explain what platform she is even running on.

So pathetic. pic.twitter.com/H9KO7bErs7

— Trump War Room (@TrumpWarRoom) August 13, 2024

The email also claimed Musk “ruined” Twitter, which is what X was called before he bought and rebranded it, and insisted the Tesla CEO was allowing disinformation and free speech to spread across the platform.

X is where Trump’s campaign fired back.

“President Trump has been speaking for over an hour to over a million people about his winning agenda for the American people,” the Trump campaign said in a post to X, along with a screenshot of the fundraising email.

“Kamala is BIG MAD about this as she refuses to speak to the media, do an interview, or even explain what platform she is even running on,” the post added. “So pathetic.”

The Spaces talk with Trump got off to a glitchy start, though it managed to proceed following a brief delay. Musk said X, formerly known as Twitter, appeared to have endured a “massive” DDOS attack.

Musk said he was calling his Spaces chat with Trump a “conversation” so that people can understand how Trump talks in a conversation rather than an interview. “Nobody is quite themselves in an interview, so it’s hard to understand what they’re really like,” he added.

Earlier in the day, Trump’s X account started to come alive for the first time in nearly a year with a flurry of posts, including one that asked, “Are you better off now than you were when I was president?”

Musk announced last month he would be supporting Trump after the former president survived an assassination attempt during a campaign rally in Pennsylvania. He has also reportedly gotten behind a pro-Trump super PAC.