Elon Musk, the world’s richest man, blamed fellow billionaires George Soros, Reid Hoffman and the ActBlue fundraising organization over recent protests targeting his firm Tesla, citing an “investigation”—though it’s unclear what investigation he’s referencing.

Elon Musk, the cost-cutting billionaire in the Trump administration, has accused Democratic donors George Soros, Reid Hoffman and others of funding protests against his electric car company Tesla.

Elon Musk, never one to shy away from controversy, has fired off yet another explosive tweet—this time claiming that a coordinated attack against Tesla is being orchestrated by groups allegedly funded by ActBlue,