Philadelphia’s attorney general sued billionaire Elon Musk and his pro-Trump political action committee on Monday to stop his $1 million in donations to registered voters.

The lawsuit against the SpaceX and Tesla CEO’s America PAC was filed in a state court in Pennsylvania by District Attorney Larry Krasner, a Democrat.

“The Philadelphia District Attorney is charged with protecting the public from public nuisances and unfair business practices, including illegal lotteries,” Krasner said in a statement.

“The DA is also charged with protecting the public from interference with the integrity of elections,” he said.

Last week, the Justice Department sent a letter to Musk’s America PAC, warning that its $1 million gifts could violate federal law that prohibits paying people to register to vote.

Musk, 53, who also owns X, formerly Twitter, has poured his millions, time and considerable influence into supporting Republican presidential nominee Donald Trump since endorsing him in July.

Musk reportedly donated $118 million to his personal pro-Trump political action committee, an organization that collects funds for the election.

He also appeared on stage with Trump at a campaign rally in Pennsylvania and hosted a series of town halls on his own in the battleground state, seen as critical in the November election.

Musk, who previously supported Barack Obama but has become increasingly conservative in recent years, adds to his 202 million followers on X daily with messages supporting Trump and disparaging his opponent, Democratic Vice President Kamala Harris.

cl/no