A government watchdog group in Wisconsin has filed a lawsuit seeking to prohibit billionaire Elon Musk from ever again offering cash payments to voters in the battleground state like he did in this spring’s hotly contested Supreme Court race.

A complaint says Musk violated the state’s election law in “a brazen scheme to bribe Wisconsin citizens to vote” during the state’s high-stakes Supreme Court election.

A government watchdog group in Wisconsin is suing Elon Musk over claims he illegally bribed voters by handing out cash prizes during the state’s hotly-contested Supreme Court election earlier this year.