Elon Musk is mulling legal action against Minnesota Gov. Tim Walz for suggesting Musk performed the Nazi salute during his speech after President Donald Trump’s inauguration earlier this month.

Elon Musk, billionaire adviser to President Donald Trump, leaned into the accusations that his Monday salute was a “Sieg heil” gesture with a series of trollish Nazi puns on X. “Don’t say Hess to Nazi accusations!” Musk wrote Thursday, referring to German Nazi Party leader Adolf Hitler’s deputy, Rudolf Hess.

The world’s richest person has heaped praise on the Alternative for Deutschland party in recent weeks ahead of the country’s upcoming election.