The ruling came after the Wisconsin Court of Appeals denied a bid by Attorney General Josh Kaul to stop Elon Musk from issuing payments to voters.

The case was brought by the Midwestern state's attorney general over payments Musk has offered to individuals who sign an election-related petition.

Taking the stage in Green Bay wearing a yellow foam cheesehead hat, Elon Musk gave out $1 million checks on Sunday to two Wisconsin voters.

Wisconsin approved unlimited political spending. Now, as spending for its Supreme Court race surpasses more than $80 million, some campaign reformers are wondering if the state is reaching a tipping point.

A federal law bans the practice of paying people to vote or register to vote, potentially affecting Musk's initiative in Wisconsin.

Musk’s heavy political involvement in the battle for control of the Wisconsin Supreme Court has made him a central figure in the race.

The court declined to quickly intervene before a Musk event Sunday at which he plans to give out two $1 million checks.